2(x+3)-2(x+4)=21

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Solution for 2(x+3)-2(x+4)=21 equation: 


Simplifying
2(x + 3) + -2(x + 4) = 21

Reorder the terms:
2(3 + x) + -2(x + 4) = 21
(3 * 2 + x * 2) + -2(x + 4) = 21
(6 + 2x) + -2(x + 4) = 21

Reorder the terms:
6 + 2x + -2(4 + x) = 21
6 + 2x + (4 * -2 + x * -2) = 21
6 + 2x + (-8 + -2x) = 21

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

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

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

Solving
-2 = 21

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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