Question

Solve for x:-3x – 9 = x– 1

Answer 1

The given equation is

$-3x-9=x-1$

First, we have to sum 9 on each side

$\begin{gathered} -3x-9+9=x-1+9 \\ -3x=x+8 \end{gathered}$

Now, we subtract x on each side

$\begin{gathered} -3x-x=x+8-x \\ -4x=8 \end{gathered}$

At last, we divide the equation by -4

$\begin{gathered} \frac{-4x}{-4}=\frac{8}{-4} \\ x=-2 \end{gathered}$

Therefore, the solution is -2.