Question

tìm x: \(\frac{x-1}{x+5}=\frac{6}{7}\)

Answer 1

ĐK: \(x\ne-5\)

\(\frac{x-1}{x+5}=\frac{6}{7}\Leftrightarrow7\left(x-1\right)=6\left(x+5\right)\)\(\Leftrightarrow7x-7=6x+30\Rightarrow x=37\)

Answer 2

\(\frac{x-1}{x+5}=\frac{6}{7}\\ \Leftrightarrow7x-7=6x+30\\ \Leftrightarrow7x-6x=7+30\\ x=37\)

VẬy..