12x+8-5x-2=3x+x-21+6

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Solution for 12x+8-5x-2=3x+x-21+6 equation:


Simplifying
12x + 8 + -5x + -2 = 3x + x + -21 + 6

Reorder the terms:
8 + -2 + 12x + -5x = 3x + x + -21 + 6

Combine like terms: 8 + -2 = 6
6 + 12x + -5x = 3x + x + -21 + 6

Combine like terms: 12x + -5x = 7x
6 + 7x = 3x + x + -21 + 6

Reorder the terms:
6 + 7x = -21 + 6 + 3x + x

Combine like terms: -21 + 6 = -15
6 + 7x = -15 + 3x + x

Combine like terms: 3x + x = 4x
6 + 7x = -15 + 4x

Solving
6 + 7x = -15 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
6 + 7x + -4x = -15 + 4x + -4x

Combine like terms: 7x + -4x = 3x
6 + 3x = -15 + 4x + -4x

Combine like terms: 4x + -4x = 0
6 + 3x = -15 + 0
6 + 3x = -15

Add '-6' to each side of the equation.
6 + -6 + 3x = -15 + -6

Combine like terms: 6 + -6 = 0
0 + 3x = -15 + -6
3x = -15 + -6

Combine like terms: -15 + -6 = -21
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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