21+7x-2x-2x-6=-8+3x-3

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Solution for 21+7x-2x-2x-6=-8+3x-3 equation: 


Simplifying
21 + 7x + -2x + -2x + -6 = -8 + 3x + -3

Reorder the terms:
21 + -6 + 7x + -2x + -2x = -8 + 3x + -3

Combine like terms: 21 + -6 = 15
15 + 7x + -2x + -2x = -8 + 3x + -3

Combine like terms: 7x + -2x = 5x
15 + 5x + -2x = -8 + 3x + -3

Combine like terms: 5x + -2x = 3x
15 + 3x = -8 + 3x + -3

Reorder the terms:
15 + 3x = -8 + -3 + 3x

Combine like terms: -8 + -3 = -11
15 + 3x = -11 + 3x

Add '-3x' to each side of the equation.
15 + 3x + -3x = -11 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + 0 = -11 + 3x + -3x
15 = -11 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 = -11 + 0
15 = -11

Solving
15 = -11

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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