(5x-7y)-(5x-7y)=

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Solution for (5x-7y)-(5x-7y)= equation: 


Simplifying
(5x + -7y) + -1(5x + -7y) = 0

Remove parenthesis around (5x + -7y)
5x + -7y + -1(5x + -7y) = 0
5x + -7y + (5x * -1 + -7y * -1) = 0
5x + -7y + (-5x + 7y) = 0

Reorder the terms:
5x + -5x + -7y + 7y = 0

Combine like terms: 5x + -5x = 0
0 + -7y + 7y = 0
-7y + 7y = 0

Combine like terms: -7y + 7y = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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