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

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


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

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

Combine like terms: 6x + -8x = -2x
6 + -7x = 21 + -2x

Solving
6 + -7x = 21 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
6 + -7x + 2x = 21 + -2x + 2x

Combine like terms: -7x + 2x = -5x
6 + -5x = 21 + -2x + 2x

Combine like terms: -2x + 2x = 0
6 + -5x = 21 + 0
6 + -5x = 21

Add '-6' to each side of the equation.
6 + -6 + -5x = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -5x = 21 + -6
-5x = 21 + -6

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

Divide each side by '-5'.
x = -3

Simplifying
x = -3

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