7-21x=7-21x

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Solution for 7-21x=7-21x equation: 


Simplifying
7 + -21x = 7 + -21x

Add '-7' to each side of the equation.
7 + -7 + -21x = 7 + -7 + -21x

Combine like terms: 7 + -7 = 0
0 + -21x = 7 + -7 + -21x
-21x = 7 + -7 + -21x

Combine like terms: 7 + -7 = 0
-21x = 0 + -21x
-21x = -21x

Add '21x' to each side of the equation.
-21x + 21x = -21x + 21x

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

Combine like terms: -21x + 21x = 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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