5x+99=12x-90

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Solution for 5x+99=12x-90 equation:


Simplifying
5x + 99 = 12x + -90

Reorder the terms:
99 + 5x = 12x + -90

Reorder the terms:
99 + 5x = -90 + 12x

Solving
99 + 5x = -90 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
99 + 5x + -12x = -90 + 12x + -12x

Combine like terms: 5x + -12x = -7x
99 + -7x = -90 + 12x + -12x

Combine like terms: 12x + -12x = 0
99 + -7x = -90 + 0
99 + -7x = -90

Add '-99' to each side of the equation.
99 + -99 + -7x = -90 + -99

Combine like terms: 99 + -99 = 0
0 + -7x = -90 + -99
-7x = -90 + -99

Combine like terms: -90 + -99 = -189
-7x = -189

Divide each side by '-7'.
x = 27

Simplifying
x = 27

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