90-5n=9n+20

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Solution for 90-5n=9n+20 equation:


Simplifying
90 + -5n = 9n + 20

Reorder the terms:
90 + -5n = 20 + 9n

Solving
90 + -5n = 20 + 9n

Solving for variable 'n'.

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

Add '-9n' to each side of the equation.
90 + -5n + -9n = 20 + 9n + -9n

Combine like terms: -5n + -9n = -14n
90 + -14n = 20 + 9n + -9n

Combine like terms: 9n + -9n = 0
90 + -14n = 20 + 0
90 + -14n = 20

Add '-90' to each side of the equation.
90 + -90 + -14n = 20 + -90

Combine like terms: 90 + -90 = 0
0 + -14n = 20 + -90
-14n = 20 + -90

Combine like terms: 20 + -90 = -70
-14n = -70

Divide each side by '-14'.
n = 5

Simplifying
n = 5

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