-57-2x=8x+21

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Solution for -57-2x=8x+21 equation:


Simplifying
-57 + -2x = 8x + 21

Reorder the terms:
-57 + -2x = 21 + 8x

Solving
-57 + -2x = 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.
-57 + -2x + -8x = 21 + 8x + -8x

Combine like terms: -2x + -8x = -10x
-57 + -10x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
-57 + -10x = 21 + 0
-57 + -10x = 21

Add '57' to each side of the equation.
-57 + 57 + -10x = 21 + 57

Combine like terms: -57 + 57 = 0
0 + -10x = 21 + 57
-10x = 21 + 57

Combine like terms: 21 + 57 = 78
-10x = 78

Divide each side by '-10'.
x = -7.8

Simplifying
x = -7.8

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