-21-x=7(6x-8)-8

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Solution for -21-x=7(6x-8)-8 equation:


Simplifying
-21 + -1x = 7(6x + -8) + -8

Reorder the terms:
-21 + -1x = 7(-8 + 6x) + -8
-21 + -1x = (-8 * 7 + 6x * 7) + -8
-21 + -1x = (-56 + 42x) + -8

Reorder the terms:
-21 + -1x = -56 + -8 + 42x

Combine like terms: -56 + -8 = -64
-21 + -1x = -64 + 42x

Solving
-21 + -1x = -64 + 42x

Solving for variable 'x'.

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

Add '-42x' to each side of the equation.
-21 + -1x + -42x = -64 + 42x + -42x

Combine like terms: -1x + -42x = -43x
-21 + -43x = -64 + 42x + -42x

Combine like terms: 42x + -42x = 0
-21 + -43x = -64 + 0
-21 + -43x = -64

Add '21' to each side of the equation.
-21 + 21 + -43x = -64 + 21

Combine like terms: -21 + 21 = 0
0 + -43x = -64 + 21
-43x = -64 + 21

Combine like terms: -64 + 21 = -43
-43x = -43

Divide each side by '-43'.
x = 1

Simplifying
x = 1

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