Answer:
x = -10(see explanation!)
Explanation:
With any equation, you will want to isolate the variable, in this case x. Here's a step by step:
3(x+4) = -18
Distribute the 3:
3*x + 4*3 = -18
Simplify:
3x + 12 = -18
Subtract 12 on both sides to isolate x:
3x + 12 - 12 = -18 - 12
Simplify:
3x = -30
Finally, divide by three to get the x value:
3x/3 = -30/3
x = -10