3x+6+9x-12+6x-12=180

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Solution for 3x+6+9x-12+6x-12=180 equation: 


Simplifying
3x + 6 + 9x + -12 + 6x + -12 = 180

Reorder the terms:
6 + -12 + -12 + 3x + 9x + 6x = 180

Combine like terms: 6 + -12 = -6
-6 + -12 + 3x + 9x + 6x = 180

Combine like terms: -6 + -12 = -18
-18 + 3x + 9x + 6x = 180

Combine like terms: 3x + 9x = 12x
-18 + 12x + 6x = 180

Combine like terms: 12x + 6x = 18x
-18 + 18x = 180

Solving
-18 + 18x = 180

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 = 180 + 18

Combine like terms: -18 + 18 = 0
0 + 18x = 180 + 18
18x = 180 + 18

Combine like terms: 180 + 18 = 198
18x = 198

Divide each side by '18'.
x = 11

Simplifying
x = 11

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