9x+3x-18=99

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Solution for 9x+3x-18=99 equation:


Simplifying
9x + 3x + -18 = 99

Reorder the terms:
-18 + 9x + 3x = 99

Combine like terms: 9x + 3x = 12x
-18 + 12x = 99

Solving
-18 + 12x = 99

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 12x = 99 + 18

Combine like terms: -18 + 18 = 0
0 + 12x = 99 + 18
12x = 99 + 18

Combine like terms: 99 + 18 = 117
12x = 117

Divide each side by '12'.
x = 9.75

Simplifying
x = 9.75

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