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a)x*4/5:2=6/7 b)6/5:x:5/4=10/15
x*4/5=6/7 x 2 6/5:x=10/15 x 5/4
x*4/5=12/7 6/5:x=5/6
x=12/7:4/5 x=6/5:5/6
x=15/7 x=36/25
a) x * 4/5 : 2 = 6/7
x * 4/5 = 6/7 *2
x *4/5 = 12/7
x = 12/7 : 4/5
x = 15/7
Vậy x = 15/7
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\(\left(x+\dfrac{1}{3}\right)\times\dfrac{9}{14}\times\dfrac{7}{3}-\dfrac{1}{3}=1:\dfrac{9}{5}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}-\dfrac{1}{3}=\dfrac{5}{9}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}=\dfrac{5}{9}+\dfrac{1}{3}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}=\dfrac{8}{9}\\ \Rightarrow x+\dfrac{1}{3}=\dfrac{8}{9}:\dfrac{3}{2}\\ \Rightarrow x+\dfrac{1}{3}=\dfrac{16}{27}\\ \Rightarrow x=\dfrac{16}{27}-\dfrac{1}{3}\\ \Rightarrow x=\dfrac{7}{27}\)
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0.12 : 0.5 + 0.36 x 2 + 0.36 + 0.36
= 0.12 *2 + 0.36 x ( 2 + 1 + 1 )
= 0.12 x 2 + 0.36 x 4
= 0.12 x 2 + 0.12 x 12
= 0.12 x ( 2 + 12 )
= 0.12 x 14 = 1.68
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2xX+2015=10000
2xX=10000-2015
2xX=7985
x=7985:2
x=3992,5
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X x 10 + X + X = 2016
X x ( 10 + 1 + 1 ) = 2016
X x 12 = 2016
X = 2016 / 12
X = 168 k mk , mk sẽ k lại bn
\(x\times10+x+x=2016\)
\(x\times10+x\times2=2016\)
\(x\times\left(10+2\right)=2016\)
\(x\times12=2016\)
\(x=2016:12\)
\(x=168\)
ai k mik mik k lại
ko nói dối
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x + x + 25 = 315
2x +25 = 315
2x = 315 - 25
2x = 290
x =290 :2
x = 145
\(x:2\times5+1234=2234\)
\(x:2\times5=2234-1234\)
\(x:2\times5=1000\)
\(x:2=1000:5\)
\(x:2=200\)
\(x=200\times2\)
\(x=400\)
@muối
x=400