-6x+7+8=-13-5x+21

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Solution for -6x+7+8=-13-5x+21 equation: 


Simplifying
-6x + 7 + 8 = -13 + -5x + 21

Reorder the terms:
7 + 8 + -6x = -13 + -5x + 21

Combine like terms: 7 + 8 = 15
15 + -6x = -13 + -5x + 21

Reorder the terms:
15 + -6x = -13 + 21 + -5x

Combine like terms: -13 + 21 = 8
15 + -6x = 8 + -5x

Solving
15 + -6x = 8 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
15 + -6x + 5x = 8 + -5x + 5x

Combine like terms: -6x + 5x = -1x
15 + -1x = 8 + -5x + 5x

Combine like terms: -5x + 5x = 0
15 + -1x = 8 + 0
15 + -1x = 8

Add '-15' to each side of the equation.
15 + -15 + -1x = 8 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 8 + -15
-1x = 8 + -15

Combine like terms: 8 + -15 = -7
-1x = -7

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

Simplifying
x = 7

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