-21=-5n+2n

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Solution for -21=-5n+2n equation:


Simplifying
-21 = -5n + 2n

Combine like terms: -5n + 2n = -3n
-21 = -3n

Solving
-21 = -3n

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '3n' to each side of the equation.
-21 + 3n = -3n + 3n

Combine like terms: -3n + 3n = 0
-21 + 3n = 0

Add '21' to each side of the equation.
-21 + 21 + 3n = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 3n = 0 + 21
3n = 0 + 21

Combine like terms: 0 + 21 = 21
3n = 21

Divide each side by '3'.
n = 7

Simplifying
n = 7

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