Question

Tìm x:

3(x+2) = 5(x-3)-x

Answer 1

\(3\left(x+2\right)=5\left(x-3\right)-x\)

\(\Rightarrow3x+6=5x-15-x\)

\(\Rightarrow3x-5x+x=-6-15\)

\(\Rightarrow-x=-21\)

\(\Rightarrow x=21\)

Vậy \(x=21.\)

Answer 2

\(\text{3(x + 2) = 5(x - 3) - x}\)

\(\Leftrightarrow\) \(\text{3x + 6 = 5x - 15 - x}\)

\(\Leftrightarrow\) \(\text{3x - 5x + x = -15 - 6}\)

\(\Leftrightarrow\) \(\text{-x = -21}\)

\(\Leftrightarrow\) \(\text{x = 21.}\)

Answer 3

\(3\left(x+2\right)=5\left(x-3\right)-x\)

\(3x+6=5x-15-x\)

\(3x+6-4x-15\)

\(3x=4x-21\)

\(x=21\)