7+2n=21+2n

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Solution for 7+2n=21+2n equation: 


Simplifying
7 + 2n = 21 + 2n

Add '-2n' to each side of the equation.
7 + 2n + -2n = 21 + 2n + -2n

Combine like terms: 2n + -2n = 0
7 + 0 = 21 + 2n + -2n
7 = 21 + 2n + -2n

Combine like terms: 2n + -2n = 0
7 = 21 + 0
7 = 21

Solving
7 = 21

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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