Combine like terms on the left side of the equation:
6x + 12 = 72
Subtract 12 from both sides:
6x = 60
Divide by 6 on both sides:
x = 10
Therefore, the solution to the equation x + 5x + 12 = 72 is x = 10.
Combine like terms on the left side of the equation:
6x + 12 = 72
Subtract 12 from both sides:
6x = 60
Divide by 6 on both sides:
x = 10
Therefore, the solution to the equation x + 5x + 12 = 72 is x = 10.