-8x+9x-21=-12-12

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Solution for -8x+9x-21=-12-12 equation:


Simplifying
-8x + 9x + -21 = -12 + -12

Reorder the terms:
-21 + -8x + 9x = -12 + -12

Combine like terms: -8x + 9x = 1x
-21 + 1x = -12 + -12

Combine like terms: -12 + -12 = -24
-21 + 1x = -24

Solving
-21 + 1x = -24

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 1x = -24 + 21

Combine like terms: -21 + 21 = 0
0 + 1x = -24 + 21
1x = -24 + 21

Combine like terms: -24 + 21 = -3
1x = -3

Divide each side by '1'.
x = -3

Simplifying
x = -3

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