6n-15=2n+21

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Solution for 6n-15=2n+21 equation:


Simplifying
6n + -15 = 2n + 21

Reorder the terms:
-15 + 6n = 2n + 21

Reorder the terms:
-15 + 6n = 21 + 2n

Solving
-15 + 6n = 21 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
-15 + 6n + -2n = 21 + 2n + -2n

Combine like terms: 6n + -2n = 4n
-15 + 4n = 21 + 2n + -2n

Combine like terms: 2n + -2n = 0
-15 + 4n = 21 + 0
-15 + 4n = 21

Add '15' to each side of the equation.
-15 + 15 + 4n = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 4n = 21 + 15
4n = 21 + 15

Combine like terms: 21 + 15 = 36
4n = 36

Divide each side by '4'.
n = 9

Simplifying
n = 9

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