Answer
The solution is 5
Work Step by Step
3(x-1) -12 =0
3x-3$\times$ 1-12 =0 Apply the distributive property
3x-3 -12=0 Simplify
3x-15 =0 Add 15 to both sides
3x-15+15=0+15
3x=15 Divide both sides by 3
$\frac{3x}{3}$=$\frac{15}{3}$
x=5 The solution is 5
Check
3(x-1) -12 =0
3(5-1) -12 =0 Subtract inside the parentheses
3$\times$4 -12 =0 Multiply
12-12=0
0=0
