12x-8=-3x-21

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


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

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

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

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

Solving for variable 'x'.

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

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

Combine like terms: 12x + 3x = 15x
-8 + 15x = -21 + -3x + 3x

Combine like terms: -3x + 3x = 0
-8 + 15x = -21 + 0
-8 + 15x = -21

Add '8' to each side of the equation.
-8 + 8 + 15x = -21 + 8

Combine like terms: -8 + 8 = 0
0 + 15x = -21 + 8
15x = -21 + 8

Combine like terms: -21 + 8 = -13
15x = -13

Divide each side by '15'.
x = -0.8666666667

Simplifying
x = -0.8666666667

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