3x-12=-21-8x

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Solution for 3x-12=-21-8x equation:


Simplifying
3x + -12 = -21 + -8x

Reorder the terms:
-12 + 3x = -21 + -8x

Solving
-12 + 3x = -21 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
-12 + 3x + 8x = -21 + -8x + 8x

Combine like terms: 3x + 8x = 11x
-12 + 11x = -21 + -8x + 8x

Combine like terms: -8x + 8x = 0
-12 + 11x = -21 + 0
-12 + 11x = -21

Add '12' to each side of the equation.
-12 + 12 + 11x = -21 + 12

Combine like terms: -12 + 12 = 0
0 + 11x = -21 + 12
11x = -21 + 12

Combine like terms: -21 + 12 = -9
11x = -9

Divide each side by '11'.
x = -0.8181818182

Simplifying
x = -0.8181818182

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