Question

7/8=7/-x-2

 

Answer 1

\(\frac{7}{8}=\frac{7}{-x-2}\)

\(\Rightarrow-x-2=8\)

\(\Rightarrow-x=8+2\)

\(\Rightarrow-x=10\)

\(\Rightarrow x=-10\)

Vậy z=-10

Answer 2

\(\frac{7}{8}=\frac{7}{-x-2}\)

\(=>7\left(-x-2\right)=8.7\)

\(=>-7x-14=56\)

\(=>-7x=56+14\)

\(=>-7x=70\)

\(=>x=-10\)

Answer 3

=-10 đấy các bạn ạ