-5x-21-8x-7+9x+20=-6x+12

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Solution for -5x-21-8x-7+9x+20=-6x+12 equation:


Simplifying
-5x + -21 + -8x + -7 + 9x + 20 = -6x + 12

Reorder the terms:
-21 + -7 + 20 + -5x + -8x + 9x = -6x + 12

Combine like terms: -21 + -7 = -28
-28 + 20 + -5x + -8x + 9x = -6x + 12

Combine like terms: -28 + 20 = -8
-8 + -5x + -8x + 9x = -6x + 12

Combine like terms: -5x + -8x = -13x
-8 + -13x + 9x = -6x + 12

Combine like terms: -13x + 9x = -4x
-8 + -4x = -6x + 12

Reorder the terms:
-8 + -4x = 12 + -6x

Solving
-8 + -4x = 12 + -6x

Solving for variable 'x'.

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

Add '6x' to each side of the equation.
-8 + -4x + 6x = 12 + -6x + 6x

Combine like terms: -4x + 6x = 2x
-8 + 2x = 12 + -6x + 6x

Combine like terms: -6x + 6x = 0
-8 + 2x = 12 + 0
-8 + 2x = 12

Add '8' to each side of the equation.
-8 + 8 + 2x = 12 + 8

Combine like terms: -8 + 8 = 0
0 + 2x = 12 + 8
2x = 12 + 8

Combine like terms: 12 + 8 = 20
2x = 20

Divide each side by '2'.
x = 10

Simplifying
x = 10

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