7x-9+2x=72

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Solution for 7x-9+2x=72 equation: 


Simplifying
7x + -9 + 2x = 72

Reorder the terms:
-9 + 7x + 2x = 72

Combine like terms: 7x + 2x = 9x
-9 + 9x = 72

Solving
-9 + 9x = 72

Solving for variable 'x'.

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

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

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

Combine like terms: 72 + 9 = 81
9x = 81

Divide each side by '9'.
x = 9

Simplifying
x = 9

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