Question

a> -3/9+7/15= -x+(-5/18)

b> 2x-3/4= x-1/2

help me, cần gấp nhé!!

Answer 1

\(a;-\frac{3}{9}+\frac{7}{15}=-x+\left(-\frac{5}{18}\right)\)

\(\Rightarrow\frac{2}{15}=-x-\frac{5}{18}\)

\(\Rightarrow-x=\frac{2}{15}+\frac{5}{18}=\frac{37}{90}\)

\(b;2x-\frac{3}{4}=x-\frac{1}{2}\)

\(\Rightarrow2x-x=-\frac{1}{2}+\frac{3}{4}\)

\(\Rightarrow x=\frac{1}{4}\)

Answer 2

a)-3/9+7/15=-x+(-5/18)                     b)2x-3/4= x-1/2

 =>-x+(-7/15)=2/15                          =>2x-x=3/4-1/2

 =>-x=2/15-(-7/15)                           =>x=1/4

 =>-x=3/5

 =>x=+3/5