Question

2(x-1/2)-5(3/10-1)=7

ai giups mk vs .Mik đang gấp

Answer 1

\(2\left(x-\frac{1}{2}\right)-5\left(\frac{3}{10}-1\right)=7\)

\(\Rightarrow\left(2x-1\right)-\left(\frac{3}{2}-5\right)=7\)

\(\Rightarrow\left(2x-1\right)-\frac{-7}{2}=7\)

\(\Rightarrow\left(2x-1\right)=7+\frac{-7}{2}=\frac{7}{2}\)

\(\Rightarrow2x=\frac{7}{2}+1\)

\(\Rightarrow x=\frac{9}{2}:2\)

\(\Rightarrow x=\frac{9}{4}\)

Answer 2

2(x-1/2)-5(3/10-1)=7

2x-1-3/2+5=7

2x=7+1+3/2-5

2x=9/2

x=9/4 

Vậy x=9/4.