5n+9=3n-21

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Solution for 5n+9=3n-21 equation:


Simplifying
5n + 9 = 3n + -21

Reorder the terms:
9 + 5n = 3n + -21

Reorder the terms:
9 + 5n = -21 + 3n

Solving
9 + 5n = -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.
9 + 5n + -3n = -21 + 3n + -3n

Combine like terms: 5n + -3n = 2n
9 + 2n = -21 + 3n + -3n

Combine like terms: 3n + -3n = 0
9 + 2n = -21 + 0
9 + 2n = -21

Add '-9' to each side of the equation.
9 + -9 + 2n = -21 + -9

Combine like terms: 9 + -9 = 0
0 + 2n = -21 + -9
2n = -21 + -9

Combine like terms: -21 + -9 = -30
2n = -30

Divide each side by '2'.
n = -15

Simplifying
n = -15

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