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(14 x 14 - X - 16) : 4 =148 : 4
(14 x 14 - 16- X) : 4 = 37
( 180 - X ) : 4 =37
180 - X =37 x 4
180 - X =148
X =180 - 148
X =32
(14 x14- X-16):4=148:4
14 x14 -X-16=148
196-X-16 =148
180-X =148
X=180-148
x=32
4/5 x 15/11 x 2/9 = 8/33
4/7 x 2/5 + 4/7 x 3/5 = 4/7
( 5/7 + 7/8 ) x 2 = 89/28
2/14 + 3/7 - 3/14 x 2 = 1/7
tk mình nhé, mk nhanh nhất
1, \(14:x+6=8\)
\(14:x=8-6=2\)
\(x=14:2=6\)
2, \(x:\frac{1}{4}\cdot5=50\)
\(x:\frac{1}{4}=50:5=10\)
\(x=10\cdot\frac{1}{4}=2,5\)
3, \(x:\frac{7}{3}+4=16\)
\(x:\frac{7}{3}=16-4=12\)
\(x=12\cdot\frac{7}{3}=28\)
4, \(24-x\cdot\frac{1}{3}=14\)
\(x\cdot\frac{1}{3}=24-14=10\)
\(x=10:\frac{1}{3}=0,3\)
TK MK NHA. CÂU CUỐI MK KO LÀM ĐÂU. ^_^
a, = \(\frac{11}{21}\)x \(\left(\frac{7}{4}+\frac{5}{4}\right)\)
= \(\frac{11}{21}\)x 3
= \(\frac{33}{21}\)
b) = \(\left(\frac{23}{14}-\frac{9}{14}\right)\)x \(\frac{6}{13}\)
= 1 x \(\frac{6}{13}\)
= \(\frac{6}{13}\)
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X x 1 + X x 1/3 : 4/18 +X :4/14 = 462
X x 1 + X x 18/12 +X x 14/4 = 462
X x ( 1 + 18/12 +14/4 ) = 462
X x 6 = 462
X = 462 :6
X = 77
vậy X = 77
nhớ tk lại cho mình nha
\(a)\frac{5}{12}+\frac{3}{14}+\frac{7}{12}=\left(\frac{5}{12}+\frac{7}{12}\right)+\frac{3}{4}=1+\frac{3}{4}=\frac{7}{4}\)
\(b)\frac{15}{14}\times\frac{17}{18}\times\frac{28}{15}=\frac{15\times17\times28}{14\times18\times15}=\frac{17}{9}\)
\(c)\frac{5}{8}\times\frac{5}{4}+\frac{5}{4}\times\frac{3}{8}=\frac{5}{4}\times\left(\frac{5}{8}+\frac{3}{8}\right)=\frac{5}{4}\times1=\frac{5}{8}\)
\(a)\frac{5}{12}+\frac{3}{14}+\frac{7}{12}=\left(\frac{5}{12}+\frac{7}{12}\right)+\frac{3}{4}=1+\frac{3}{4}=\frac{7}{4}\)
\(b)\frac{15}{14}\times\frac{17}{18}\times\frac{28}{15}=\frac{15\times17\times28}{14\times18\times15}=\frac{17}{9}\)
\(c)\frac{5}{8}\times\frac{5}{4}+\frac{5}{4}\times\frac{3}{8}=\frac{5}{4}\times\left(\frac{5}{8}+\frac{3}{8}\right)=\frac{5}{4}\times1=\frac{5}{8}\)
~Học tốt~
Trả lời:
X.14-X.4=5680
<=> x.(14-4)=5680
<=> x.10=5680
<=> x= 5680:10
=> x=568
~Học tốt!~
Trả lời:
X.14-X.4=5680
<=> x.(14-4)= 5680
<=> x.10= 5680
=> x= 5680: 10
=> x= 568