2(x-12)+(x-12)=90

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Solution for 2(x-12)+(x-12)=90 equation: 


Simplifying
2(x + -12) + (x + -12) = 90

Reorder the terms:
2(-12 + x) + (x + -12) = 90
(-12 * 2 + x * 2) + (x + -12) = 90
(-24 + 2x) + (x + -12) = 90

Reorder the terms:
-24 + 2x + (-12 + x) = 90

Remove parenthesis around (-12 + x)
-24 + 2x + -12 + x = 90

Reorder the terms:
-24 + -12 + 2x + x = 90

Combine like terms: -24 + -12 = -36
-36 + 2x + x = 90

Combine like terms: 2x + x = 3x
-36 + 3x = 90

Solving
-36 + 3x = 90

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 3x = 90 + 36

Combine like terms: -36 + 36 = 0
0 + 3x = 90 + 36
3x = 90 + 36

Combine like terms: 90 + 36 = 126
3x = 126

Divide each side by '3'.
x = 42

Simplifying
x = 42

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