14x-14x+(-7y+7y)=21-21

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Solution for 14x-14x+(-7y+7y)=21-21 equation: 


Simplifying
14x + -14x + (-7y + 7y) = 21 + -21

Combine like terms: -7y + 7y = 0
14x + -14x + (0) = 21 + -21
14x + -14x + 0 = 21 + -21

Reorder the terms:
0 + 14x + -14x = 21 + -21
Remove the zero:
14x + -14x = 21 + -21

Combine like terms: 14x + -14x = 0
0 = 21 + -21

Combine like terms: 21 + -21 = 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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