-15-12=8x+21

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Solution for -15-12=8x+21 equation:


Simplifying
-15 + -12 = 8x + 21

Combine like terms: -15 + -12 = -27
-27 = 8x + 21

Reorder the terms:
-27 = 21 + 8x

Solving
-27 = 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.
-27 + -8x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
-27 + -8x = 21 + 0
-27 + -8x = 21

Add '27' to each side of the equation.
-27 + 27 + -8x = 21 + 27

Combine like terms: -27 + 27 = 0
0 + -8x = 21 + 27
-8x = 21 + 27

Combine like terms: 21 + 27 = 48
-8x = 48

Divide each side by '-8'.
x = -6

Simplifying
x = -6

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