12x+9=13x-6

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Solution for 12x+9=13x-6 equation:


Simplifying
12x + 9 = 13x + -6

Reorder the terms:
9 + 12x = 13x + -6

Reorder the terms:
9 + 12x = -6 + 13x

Solving
9 + 12x = -6 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
9 + 12x + -13x = -6 + 13x + -13x

Combine like terms: 12x + -13x = -1x
9 + -1x = -6 + 13x + -13x

Combine like terms: 13x + -13x = 0
9 + -1x = -6 + 0
9 + -1x = -6

Add '-9' to each side of the equation.
9 + -9 + -1x = -6 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = -6 + -9
-1x = -6 + -9

Combine like terms: -6 + -9 = -15
-1x = -15

Divide each side by '-1'.
x = 15

Simplifying
x = 15

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