72=x+8x

Solution for 72=x+8x equation:

Simplifying
72 = x + 8x

Combine like terms: x + 8x = 9x
72 = 9x

Solving
72 = 9x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9x' to each side of the equation.
72 + -9x = 9x + -9x

Combine like terms: 9x + -9x = 0
72 + -9x = 0

Add '-72' to each side of the equation.
72 + -72 + -9x = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -9x = 0 + -72
-9x = 0 + -72

Combine like terms: 0 + -72 = -72
-9x = -72

Divide each side by '-9'.
x = 8

Simplifying
x = 8