7n-21-2n-8=2n-9

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Solution for 7n-21-2n-8=2n-9 equation:


Simplifying
7n + -21 + -2n + -8 = 2n + -9

Reorder the terms:
-21 + -8 + 7n + -2n = 2n + -9

Combine like terms: -21 + -8 = -29
-29 + 7n + -2n = 2n + -9

Combine like terms: 7n + -2n = 5n
-29 + 5n = 2n + -9

Reorder the terms:
-29 + 5n = -9 + 2n

Solving
-29 + 5n = -9 + 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.
-29 + 5n + -2n = -9 + 2n + -2n

Combine like terms: 5n + -2n = 3n
-29 + 3n = -9 + 2n + -2n

Combine like terms: 2n + -2n = 0
-29 + 3n = -9 + 0
-29 + 3n = -9

Add '29' to each side of the equation.
-29 + 29 + 3n = -9 + 29

Combine like terms: -29 + 29 = 0
0 + 3n = -9 + 29
3n = -9 + 29

Combine like terms: -9 + 29 = 20
3n = 20

Divide each side by '3'.
n = 6.666666667

Simplifying
n = 6.666666667

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