-7(n-3)=-7n+21

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Solution for -7(n-3)=-7n+21 equation: 


Simplifying
-7(n + -3) = -7n + 21

Reorder the terms:
-7(-3 + n) = -7n + 21
(-3 * -7 + n * -7) = -7n + 21
(21 + -7n) = -7n + 21

Reorder the terms:
21 + -7n = 21 + -7n

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

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

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

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

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

Combine like terms: -7n + 7n = 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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