5a+7-7a+5+2a=

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Solution for 5a+7-7a+5+2a= equation: 


Simplifying
5a + 7 + -7a + 5 + 2a = 0

Reorder the terms:
7 + 5 + 5a + -7a + 2a = 0

Combine like terms: 7 + 5 = 12
12 + 5a + -7a + 2a = 0

Combine like terms: 5a + -7a = -2a
12 + -2a + 2a = 0

Combine like terms: -2a + 2a = 0
12 + 0 = 0
12 = 0

Solving
12 = 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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