12x+9=15x-18

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Solution for 12x+9=15x-18 equation:


Simplifying
12x + 9 = 15x + -18

Reorder the terms:
9 + 12x = 15x + -18

Reorder the terms:
9 + 12x = -18 + 15x

Solving
9 + 12x = -18 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
9 + 12x + -15x = -18 + 15x + -15x

Combine like terms: 12x + -15x = -3x
9 + -3x = -18 + 15x + -15x

Combine like terms: 15x + -15x = 0
9 + -3x = -18 + 0
9 + -3x = -18

Add '-9' to each side of the equation.
9 + -9 + -3x = -18 + -9

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

Combine like terms: -18 + -9 = -27
-3x = -27

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

Simplifying
x = 9

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