5 -3*x+0.25 = 3 /4 -1.25
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0,25 X x = 0,75+0,25
0,25 X x = 1
x = 1:0,25
x = 4
x : 1.25 =1/4 - 0,25
x : 1,25 = 0,75
x = 0,75 x 1,25
x = 0,9375
0,25 X x = 0,75+0,25
0,25 X x = 1
x = 1:0,25
x = 4
0,25 x x = 0,75+0,25
0,25x x = 1
x = 1 : 0,25
x = 4
x : 1,25 =\(\frac{1}{4}\) - 0,25
x : 1,25 = \(\frac{1}{4}-\frac{25}{100}\)
x : 1,25 = \(\frac{1}{4}-\frac{1}{4}\)
x : 1,25 = 0
x = 0 x 1,25
x = 0
0,25 x x = 0,75+0,25
0,25x x = 1
x = 1 : 0,25
x = 4
( 1.1 x 1.2 x 1.3 x 1.4 x 1.5 x 1.6 ) x ( 1.25 - 0.25 x 5 )
=( 1,1 x 1,2 x1,3 x1,4 x1,5 x1,6 ) x ( 1,25 - 1,25 )
=( 1.1x1,2 x1,3 x1,4 x1,5 x1,6 ) x 0
=0
#Toán lớp 5
Ta có: \(x:1+x:0,5+x:0,25+x:1,25=60\)
\(\Rightarrow x.1+\frac{x.1}{2}+\frac{x.1}{4}+\frac{x.5}{4}=60\)
\(\Rightarrow x\left(1+\frac{1}{2}+\frac{1}{4}+\frac{5}{4}\right)\)\(=60\)
\(\Rightarrow x.3=60\)
\(\Rightarrow x=60:3=20\)
pham nguyet anh ! Tk For me ^_~!
Xin lỗi mình nhầm:
ta có : \(x.1+x.2+x.4+\frac{x.4}{5}=60\)
\(\Rightarrow x\left(1+2+4+\frac{4}{5}\right)=60\)
\(\Rightarrow x=60:\left(1+2+4+\frac{4}{5}\right)=60:\frac{39}{5}=\frac{100}{13}\)
12.48 : 0.5 x 6.25 x 4 x 2 = 1248
2 x 3.12 x 1.25 : 0.25 x 10 = 312
102,3 : 0,25 : 40 + 98,3 : 1,25 :8
= 102,3 x 40:40 + 98,3 x 8:8
= 102,3 x ( 40:40) + 98,3 x ( 8:8)
= 102,3 x 1+ 98,3 x1
= 102,3 + 98,3
=200,6
Tick cho tớ với c ưi
\(\dfrac{3}{2}x+\dfrac{3}{7}=-\dfrac{4}{5}\)
\(\Leftrightarrow\dfrac{3}{2}x=-\dfrac{43}{35}\)
\(\Leftrightarrow x=-\dfrac{86}{105}\)
Vậy \(x=-\dfrac{86}{105}\)
\(-\dfrac{11}{12}x+0,25=\dfrac{5}{6}\)
\(\Leftrightarrow-\dfrac{11}{12}x+\dfrac{1}{4}=\dfrac{5}{6}\)
\(\Leftrightarrow-\dfrac{11}{12}x=\dfrac{7}{12}\)
\(\Leftrightarrow x=-\dfrac{7}{11}\)
Vậy \(x=-\dfrac{7}{11}\)
\(\left(x-2\right)^2=1\)
\(\Leftrightarrow\left(x-2\right)^2-1=0\)
\(\Leftrightarrow\left(x-2-1\right)\left(x-2+1\right)=0\)
\(\Leftrightarrow\left(x-3\right)\left(x-1\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x-3=0\\x-1=0\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=1\end{matrix}\right.\)
Vậy x = {3; 1}\(\left(2x-1\right)^3=-8\)
\(\Leftrightarrow2x-1=-2\)
\(\Leftrightarrow2x=-1\)
\(\Leftrightarrow x=-\dfrac{1}{2}\)
Vậy \(x=-\dfrac{1}{2}\)
(x - 2)2 = 1
<=>\(\left[{}\begin{matrix}x-2=1\\x-2=-1\end{matrix}\right.< =>\left[{}\begin{matrix}x=3\\x=1\end{matrix}\right.\)
Vậy x = 3; 1
(2x - 1)3 = -8
<=> 2x - 1 = -2
<=> 2x = -1
<=> x = \(\dfrac{-1}{2}\)
Vậy x = \(\dfrac{-1}{2}\)
\(5-3x+0,25=\dfrac{3}{4}-1,25\\ \Leftrightarrow5,25-3x=0,75-1,25\\ \Leftrightarrow3x=5,25-0,75+1,25\\ \Leftrightarrow3x=5,75\\ \Rightarrow x=5,75:3=\dfrac{575}{100}:3=\dfrac{23}{4}:3=\dfrac{23}{12}\)