Answer:
x = -7
Step-by-step explanation:
3(x+7) = -15
First, distributive property. Therefore, you multiply 3 with x and 7
3x + 21 = -15
Then, you need x to be isolated. So you will have to -21 from +21 on both sides of the equation to make it balanced.
3x + 21 = -15
-21 -21 (21 will be canceled from the left side of the equation)
3x = -35
Lastly, you need to divide 3 from both sides of the equation, as 3 is multiplied with x.
3x = -35
3 3 (3 will be canceled from the left side of the equation)
x = -7
