7x-21-8x+12=-2

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Solution for 7x-21-8x+12=-2 equation:


Simplifying
7x + -21 + -8x + 12 = -2

Reorder the terms:
-21 + 12 + 7x + -8x = -2

Combine like terms: -21 + 12 = -9
-9 + 7x + -8x = -2

Combine like terms: 7x + -8x = -1x
-9 + -1x = -2

Solving
-9 + -1x = -2

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + -1x = -2 + 9

Combine like terms: -9 + 9 = 0
0 + -1x = -2 + 9
-1x = -2 + 9

Combine like terms: -2 + 9 = 7
-1x = 7

Divide each side by '-1'.
x = -7

Simplifying
x = -7

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