15+12=3x-9x

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Solution for 15+12=3x-9x equation:


Simplifying
15 + 12 = 3x + -9x

Combine like terms: 15 + 12 = 27
27 = 3x + -9x

Combine like terms: 3x + -9x = -6x
27 = -6x

Solving
27 = -6x

Solving for variable 'x'.

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

Add '6x' to each side of the equation.
27 + 6x = -6x + 6x

Combine like terms: -6x + 6x = 0
27 + 6x = 0

Add '-27' to each side of the equation.
27 + -27 + 6x = 0 + -27

Combine like terms: 27 + -27 = 0
0 + 6x = 0 + -27
6x = 0 + -27

Combine like terms: 0 + -27 = -27
6x = -27

Divide each side by '6'.
x = -4.5

Simplifying
x = -4.5

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