Question

Tìm x biết:

a)\(x\left(x-\frac{1}{2}\right)dương\)

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

Answer 1

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

\(\Leftrightarrow4x\left(x-2\right)-3\left(x+1\right)=0\)

\(\Leftrightarrow4x-8-3x-3=0\)

\(\Leftrightarrow4x-3x=8+3\)

\(\Leftrightarrow x=11\)

CÒN CÂU A MK CHƯA HIỂU ĐỀ LẮM Ạ!

Answer 2

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

\(\Rightarrow\left(x-2\right).4=\left(x+1\right).3\)

\(\Rightarrow4x-8=3x+3\)

\(\Rightarrow4x-3x=3+8\)

\(\Rightarrow1x=11\)

\(\Rightarrow x=11:1\)

\(\Rightarrow x=11\)

Vậy \(x=11.\)

Chúc bạn học tốt!