-8x-15+9x-1=-21

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Solution for -8x-15+9x-1=-21 equation: 


Simplifying
-8x + -15 + 9x + -1 = -21

Reorder the terms:
-15 + -1 + -8x + 9x = -21

Combine like terms: -15 + -1 = -16
-16 + -8x + 9x = -21

Combine like terms: -8x + 9x = 1x
-16 + 1x = -21

Solving
-16 + 1x = -21

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + 1x = -21 + 16

Combine like terms: -16 + 16 = 0
0 + 1x = -21 + 16
1x = -21 + 16

Combine like terms: -21 + 16 = -5
1x = -5

Divide each side by '1'.
x = -5

Simplifying
x = -5

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