15x+9=16x-12

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Solution for 15x+9=16x-12 equation:


Simplifying
15x + 9 = 16x + -12

Reorder the terms:
9 + 15x = 16x + -12

Reorder the terms:
9 + 15x = -12 + 16x

Solving
9 + 15x = -12 + 16x

Solving for variable 'x'.

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

Add '-16x' to each side of the equation.
9 + 15x + -16x = -12 + 16x + -16x

Combine like terms: 15x + -16x = -1x
9 + -1x = -12 + 16x + -16x

Combine like terms: 16x + -16x = 0
9 + -1x = -12 + 0
9 + -1x = -12

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

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

Combine like terms: -12 + -9 = -21
-1x = -21

Divide each side by '-1'.
x = 21

Simplifying
x = 21

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