6x+99=15x-9

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Solution for 6x+99=15x-9 equation:


Simplifying
6x + 99 = 15x + -9

Reorder the terms:
99 + 6x = 15x + -9

Reorder the terms:
99 + 6x = -9 + 15x

Solving
99 + 6x = -9 + 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.
99 + 6x + -15x = -9 + 15x + -15x

Combine like terms: 6x + -15x = -9x
99 + -9x = -9 + 15x + -15x

Combine like terms: 15x + -15x = 0
99 + -9x = -9 + 0
99 + -9x = -9

Add '-99' to each side of the equation.
99 + -99 + -9x = -9 + -99

Combine like terms: 99 + -99 = 0
0 + -9x = -9 + -99
-9x = -9 + -99

Combine like terms: -9 + -99 = -108
-9x = -108

Divide each side by '-9'.
x = 12

Simplifying
x = 12

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