6n-21=12n-15

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Solution for 6n-21=12n-15 equation:


Simplifying
6n + -21 = 12n + -15

Reorder the terms:
-21 + 6n = 12n + -15

Reorder the terms:
-21 + 6n = -15 + 12n

Solving
-21 + 6n = -15 + 12n

Solving for variable 'n'.

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

Add '-12n' to each side of the equation.
-21 + 6n + -12n = -15 + 12n + -12n

Combine like terms: 6n + -12n = -6n
-21 + -6n = -15 + 12n + -12n

Combine like terms: 12n + -12n = 0
-21 + -6n = -15 + 0
-21 + -6n = -15

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

Combine like terms: -21 + 21 = 0
0 + -6n = -15 + 21
-6n = -15 + 21

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

Divide each side by '-6'.
n = -1

Simplifying
n = -1

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