21-6n=-3(n-5)

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Solution for 21-6n=-3(n-5) equation:


Simplifying
21 + -6n = -3(n + -5)

Reorder the terms:
21 + -6n = -3(-5 + n)
21 + -6n = (-5 * -3 + n * -3)
21 + -6n = (15 + -3n)

Solving
21 + -6n = 15 + -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 + -6n + 3n = 15 + -3n + 3n

Combine like terms: -6n + 3n = -3n
21 + -3n = 15 + -3n + 3n

Combine like terms: -3n + 3n = 0
21 + -3n = 15 + 0
21 + -3n = 15

Add '-21' to each side of the equation.
21 + -21 + -3n = 15 + -21

Combine like terms: 21 + -21 = 0
0 + -3n = 15 + -21
-3n = 15 + -21

Combine like terms: 15 + -21 = -6
-3n = -6

Divide each side by '-3'.
n = 2

Simplifying
n = 2

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