6x+3(3x-12)=99

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Solution for 6x+3(3x-12)=99 equation:


Simplifying
6x + 3(3x + -12) = 99

Reorder the terms:
6x + 3(-12 + 3x) = 99
6x + (-12 * 3 + 3x * 3) = 99
6x + (-36 + 9x) = 99

Reorder the terms:
-36 + 6x + 9x = 99

Combine like terms: 6x + 9x = 15x
-36 + 15x = 99

Solving
-36 + 15x = 99

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 15x = 99 + 36

Combine like terms: -36 + 36 = 0
0 + 15x = 99 + 36
15x = 99 + 36

Combine like terms: 99 + 36 = 135
15x = 135

Divide each side by '15'.
x = 9

Simplifying
x = 9

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