6n+15=3n+21

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Solution for 6n+15=3n+21 equation:


Simplifying
6n + 15 = 3n + 21

Reorder the terms:
15 + 6n = 3n + 21

Reorder the terms:
15 + 6n = 21 + 3n

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

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

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

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

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

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

Divide each side by '3'.
n = 2

Simplifying
n = 2

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