12x+18=3x-9

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Solution for 12x+18=3x-9 equation:


Simplifying
12x + 18 = 3x + -9

Reorder the terms:
18 + 12x = 3x + -9

Reorder the terms:
18 + 12x = -9 + 3x

Solving
18 + 12x = -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.
18 + 12x + -3x = -9 + 3x + -3x

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

Combine like terms: 3x + -3x = 0
18 + 9x = -9 + 0
18 + 9x = -9

Add '-18' to each side of the equation.
18 + -18 + 9x = -9 + -18

Combine like terms: 18 + -18 = 0
0 + 9x = -9 + -18
9x = -9 + -18

Combine like terms: -9 + -18 = -27
9x = -27

Divide each side by '9'.
x = -3

Simplifying
x = -3

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