Answer:
x=-7
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
3(9+7x)=−120
(3)(9)+(3)(7x)=−120(Distribute)
27+21x=−120
21x+27=−120
Step 2: Subtract 27 from both sides.
21x+27−27=−120−27
21x=−147
Step 3: Divide both sides by 21.
21x/21=−147/21
x=−7
Answer:
x = -7
Step-by-step explanation:
3(9 + 7x) = -120
now simplify it
27 + 21x = -120
now you want to get the number(s) and variables on different sides
27 + 21x - 27 = 21x
-120 - 27 = -147
21x = -147
now you want to divide each side by 21
21x / 21 = x
-147 / 21 = -7
x = -7
