-4n-21=-4(n-4)

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Solution for -4n-21=-4(n-4) equation: 


Simplifying
-4n + -21 = -4(n + -4)

Reorder the terms:
-21 + -4n = -4(n + -4)

Reorder the terms:
-21 + -4n = -4(-4 + n)
-21 + -4n = (-4 * -4 + n * -4)
-21 + -4n = (16 + -4n)

Add '4n' to each side of the equation.
-21 + -4n + 4n = 16 + -4n + 4n

Combine like terms: -4n + 4n = 0
-21 + 0 = 16 + -4n + 4n
-21 = 16 + -4n + 4n

Combine like terms: -4n + 4n = 0
-21 = 16 + 0
-21 = 16

Solving
-21 = 16

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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