(12x+21)-(12x-20)=

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Solution for (12x+21)-(12x-20)= equation: 


Simplifying
(12x + 21) + -1(12x + -20) = 0

Reorder the terms:
(21 + 12x) + -1(12x + -20) = 0

Remove parenthesis around (21 + 12x)
21 + 12x + -1(12x + -20) = 0

Reorder the terms:
21 + 12x + -1(-20 + 12x) = 0
21 + 12x + (-20 * -1 + 12x * -1) = 0
21 + 12x + (20 + -12x) = 0

Reorder the terms:
21 + 20 + 12x + -12x = 0

Combine like terms: 21 + 20 = 41
41 + 12x + -12x = 0

Combine like terms: 12x + -12x = 0
41 + 0 = 0
41 = 0

Solving
41 = 0

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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