9(6-5x)-9(8-7x)=72

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Solution for 9(6-5x)-9(8-7x)=72 equation: 


Simplifying
9(6 + -5x) + -9(8 + -7x) = 72
(6 * 9 + -5x * 9) + -9(8 + -7x) = 72
(54 + -45x) + -9(8 + -7x) = 72
54 + -45x + (8 * -9 + -7x * -9) = 72
54 + -45x + (-72 + 63x) = 72

Reorder the terms:
54 + -72 + -45x + 63x = 72

Combine like terms: 54 + -72 = -18
-18 + -45x + 63x = 72

Combine like terms: -45x + 63x = 18x
-18 + 18x = 72

Solving
-18 + 18x = 72

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 18x = 72 + 18

Combine like terms: -18 + 18 = 0
0 + 18x = 72 + 18
18x = 72 + 18

Combine like terms: 72 + 18 = 90
18x = 90

Divide each side by '18'.
x = 5

Simplifying
x = 5

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