x+(x-12)=3x-9

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Solution for x+(x-12)=3x-9 equation:


Simplifying
x + (x + -12) = 3x + -9

Reorder the terms:
x + (-12 + x) = 3x + -9

Remove parenthesis around (-12 + x)
x + -12 + x = 3x + -9

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

Combine like terms: x + x = 2x
-12 + 2x = 3x + -9

Reorder the terms:
-12 + 2x = -9 + 3x

Solving
-12 + 2x = -9 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-12 + 2x + -3x = -9 + 3x + -3x

Combine like terms: 2x + -3x = -1x
-12 + -1x = -9 + 3x + -3x

Combine like terms: 3x + -3x = 0
-12 + -1x = -9 + 0
-12 + -1x = -9

Add '12' to each side of the equation.
-12 + 12 + -1x = -9 + 12

Combine like terms: -12 + 12 = 0
0 + -1x = -9 + 12
-1x = -9 + 12

Combine like terms: -9 + 12 = 3
-1x = 3

Divide each side by '-1'.
x = -3

Simplifying
x = -3

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