C) 4,5:0,3=2,25:(0,1x)
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1 tháng 10 2016
4,5:0,3=2,25:0,1x
15=2,25 : 0,1x
2,25 :15 =0,1x
0,15 =0,1x
=> 0,15:0,1
x= 1,5
31 tháng 5 2015
4,5 : 0,3 = 2,25 : (0,1.x)
15 = 2,25 : (0,1.x)
2,25 : 15 = 0,1.x
0,15 = 0,1.x
=> x = 0,15 : 0,1
x = 1,5
27 tháng 10 2021
TL:
4,5 : 0,3 = 2,25 : (0,1.x)
15 = 2,25 : (0,1.x)
2,25 : 15 = 0,1.x
0,15 = 0,1.x
=> x = 0,15 : 0,1
x = 1,5
HT
PT
1
12 tháng 10 2016
4,5 : 0,3 = 2,25 : (0,1.x)
15 = 2,25 : (0,1.x)
15 : 2,25 = 0,1.x
20/3 = 0,1.x
20/3 : 0,1 = x
200/3 = x
12 tháng 10 2016
Ta có: 4,5 : 0,3 = 2,25 : (0,1 . x)
=> 4,5 . (0,1. x) = 2,25 . 0,3
=> 0,45 . x = 0,675
=> x = 0,675 : 0,45
=> x = 1,5
Vậy x = 1,5
MH
28 tháng 9 2015
a.=> \(\frac{\left(\frac{1}{3}\right).x}{\frac{2}{3}}=\frac{\frac{7}{4}}{\frac{2}{5}}\)
=> \(\frac{1}{3}.x=\frac{7}{4}.\frac{2}{3}:\frac{2}{5}\)
=>\(\frac{1}{3}.x=\frac{35}{12}\)
=> x\(=\frac{35}{12}:\frac{1}{3}\)
Vậy x=\(\frac{35}{4}\).
b. => \(\frac{4,5}{0,3}=\frac{2,25}{0,1.x}\)
=>\(0,1.x=\frac{2,25.0,3}{4,5}\)
=>\(0,1.x=0,15\)
=>\(x=0,15:0,1\)
Vậy x=1,5
c. =>\(\frac{8}{\frac{1}{4}.x}=\frac{2}{0,02}\)
=>\(\frac{1}{4}.x=\frac{8.0,02}{2}\)
=>\(\frac{1}{4}.x=0,08\)
=>\(x=0,08:\frac{1}{4}\)
Vậy x=0,32.
d. =>\(\frac{3}{\frac{9}{4}}=\frac{\frac{3}{4}}{6.x}\)
=>\(3.6x=\frac{9}{4}.\frac{3}{4}\)
=>\(18x=\frac{27}{16}\)
=>\(x=\frac{27}{16}:18\)
Vậy x=\(\frac{3}{32}\)
17 tháng 8 2016
a) \(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)
\(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{35}{8}\)
\(\Rightarrow\frac{1}{3}.x=\frac{35}{8}.\frac{2}{3}\)
\(\Rightarrow\frac{1}{3}.x=\frac{35}{12}\)
\(\Rightarrow x=\frac{35}{12}:\frac{1}{3}\)
\(\Rightarrow x=\frac{35}{4}\)
Vậy \(x=\frac{35}{4}\)
NN
16 tháng 7 2016
a)4,5:0,3=2,25:(0,1.x)
2,25:(0,1.x)=15
0,1.x=0,15
x=0,15:0,1
x=1,5
Vậy x=1,5
b)8:\(\left(\frac{1}{4}.x\right)\)=2:0,02
8:\(\left(\frac{1}{4}.x\right)\)=100
\(\left(\frac{1}{4}.x\right)\)=\(\frac{8}{100}\)
x=\(\frac{8}{100}\):\(\frac{1}{4}\)
x=\(\frac{8}{25}\)
Vậy x=\(\frac{8}{25}\)
c)\(3:2\frac{1}{4}=\frac{3}{4}:\left(6.x\right)\)
\(\frac{3}{4}:\left(6.x\right)=\frac{4}{3}\)
6.x=\(\frac{3}{4}:\frac{4}{3}\)
6.x=\(\frac{9}{16}\)
x=\(\frac{9}{16}\):6
x=\(\frac{3}{32}\)
Vậy x=\(\frac{3}{32}\)
PA
16 tháng 7 2016
a.
\(4,5\div0,3=2,25\div\left(0,1\times x\right)\)
\(2,25\div\left(0,1\times x\right)=15\)
\(0,1\times x=\frac{2,25}{15}\)
\(0,1\times x=0,15\)
\(x=\frac{0,15}{0,1}\)
\(x=1,5\)
b.
\(8\div\left(\frac{1}{4}\times x\right)=2\div0,02\)
\(8\div\left(\frac{1}{4}\times x\right)=100\)
\(\frac{1}{4}\times x=\frac{8}{100}\)
\(\frac{1}{4}\times x=\frac{2}{25}\)
\(x=\frac{2}{25}\div\frac{1}{4}\)
\(x=\frac{2}{25}\times4\)
\(x=\frac{8}{25}\)
c.
\(3\div2^1_4=\frac{3}{4}\div\left(6\times x\right)\)
\(\frac{3}{4}\div\left(6\times x\right)=3\div2,25\)
\(\frac{3}{4}\div\left(6\times x\right)=\frac{4}{3}\)
\(6\times x=\frac{3}{4}\div\frac{4}{3}\)
\(6\times x=\frac{3}{4}\times\frac{3}{4}\)
\(6\times x=\frac{9}{16}\)
\(x=\frac{9}{16}\div6\)
\(x=\frac{9}{16}\times\frac{1}{6}\)
\(x=\frac{3}{32}\)
G
7 tháng 8 2017
Giải:
a) \(\left(\dfrac{1}{3}.x\right):\dfrac{2}{3}=1\dfrac{3}{4}:\dfrac{2}{5}\)
\(\Leftrightarrow\left(\dfrac{1}{3}x\right):\dfrac{2}{3}=\dfrac{7}{4}:\dfrac{2}{5}\)
\(\Leftrightarrow\left(\dfrac{1}{3}x\right):\dfrac{2}{3}=\dfrac{35}{8}\)
\(\Leftrightarrow\dfrac{1}{3}x=\dfrac{35}{8}.\dfrac{2}{3}\)
\(\Leftrightarrow\dfrac{1}{3}x=\dfrac{35}{12}\)
\(\Leftrightarrow x=\dfrac{35}{12}:\dfrac{1}{3}\)
\(\Leftrightarrow x=\dfrac{35}{4}\)
Vậy \(x=\dfrac{35}{4}\).
b) \(4,5:0,3=2,25\left(0,1.x\right)\)
\(\Leftrightarrow15=2,25\left(0,1.x\right)\)
\(\Leftrightarrow2,25\left(0,1.x\right)=15\)
\(\Leftrightarrow0,1.x=\dfrac{15}{2,25}\)
\(\Leftrightarrow0,1.x=\dfrac{20}{3}\)
\(\Leftrightarrow x=\dfrac{20}{3}:0,1\)
\(\Leftrightarrow x=\dfrac{200}{3}\)
Vậy \(x=\dfrac{200}{3}\).
c) \(8:\left(\dfrac{1}{4}.x\right)=2:0,02\)
\(\Leftrightarrow8:\left(\dfrac{1}{4}.x\right)=100\)
\(\Leftrightarrow\dfrac{1}{4}.x=\dfrac{2}{25}\)
\(\Leftrightarrow x=\dfrac{2}{25}:\dfrac{1}{4}\)
\(\Leftrightarrow x=\dfrac{8}{25}\)
Vậy \(x=\dfrac{8}{25}\).
d) \(3:2\dfrac{1}{4}=\dfrac{3}{4}:\left(6.x\right)\)
\(\Leftrightarrow3:\dfrac{9}{4}=\dfrac{3}{4}:\left(6.x\right)\)
\(\Leftrightarrow\dfrac{4}{3}=\dfrac{3}{4}:\left(6.x\right)\)
\(\Leftrightarrow\dfrac{4}{3}:\left(6.x\right)=\dfrac{3}{4}\)
\(\Leftrightarrow6.x=\dfrac{4}{3}:\dfrac{3}{4}\)
\(\Leftrightarrow6.x=\dfrac{16}{9}\)
\(\Leftrightarrow x=\dfrac{16}{9}:6\)
\(\Leftrightarrow x=\dfrac{8}{27}\)
Vậy \(x=\dfrac{8}{27}\).
Chúc bạn học tốt!!!
NH
30 tháng 7 2017
\(a,\dfrac{x}{6}=\dfrac{7}{3}\Rightarrow x=\dfrac{6.7}{3}\Rightarrow x=14\)
\(b,\dfrac{20}{x}=\dfrac{-12}{15}\Rightarrow x=\dfrac{20.15}{-12}\Rightarrow x=-25\)
\(c,\dfrac{-15}{35}=\dfrac{27}{x}\Rightarrow x=\dfrac{35.27}{-15}\Rightarrow x=-63\)
\(d,\dfrac{\dfrac{4}{5}}{1\dfrac{2}{5}}=\dfrac{2\dfrac{2}{5}}{x}\Rightarrow\dfrac{\dfrac{4}{5}}{\dfrac{7}{5}}=\dfrac{\dfrac{12}{5}}{x}\Rightarrow x=\dfrac{\dfrac{7}{5}.\dfrac{12}{5}}{\dfrac{4}{5}}\Rightarrow x=\dfrac{\dfrac{84}{25}}{\dfrac{4}{5}}\Rightarrow x=\dfrac{21}{5}\)
\(e,\dfrac{x}{1\dfrac{1}{4}}=\dfrac{5}{2}\Rightarrow\dfrac{x}{\dfrac{5}{4}}=\dfrac{5}{2}\Rightarrow x=\dfrac{5}{2}.\dfrac{5}{4}\Rightarrow x=\dfrac{25}{8}\)
\(f,\dfrac{\dfrac{1}{2}}{1\dfrac{1}{4}}=\dfrac{x}{3\dfrac{1}{3}}\Rightarrow\dfrac{\dfrac{1}{2}}{\dfrac{5}{4}}=\dfrac{x}{\dfrac{10}{3}}\Rightarrow x=\dfrac{\dfrac{10}{3}.\dfrac{1}{2}}{\dfrac{5}{4}}\Rightarrow x=\dfrac{\dfrac{5}{3}}{\dfrac{5}{4}}\Rightarrow x=\dfrac{4}{3}\)
\(4,5:0,3=2,25:\left(0,1x\right)\)
=>\(2,25:\left(0,1x\right)=15\)
=>\(0,1\cdot x=2,25:15=0,15\)
=>\(x=0,15:0,1=1,5\)