90=3(n+10)

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Solution for 90=3(n+10) equation:


Simplifying
90 = 3(n + 10)

Reorder the terms:
90 = 3(10 + n)
90 = (10 * 3 + n * 3)
90 = (30 + 3n)

Solving
90 = 30 + 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.
90 + -3n = 30 + 3n + -3n

Combine like terms: 3n + -3n = 0
90 + -3n = 30 + 0
90 + -3n = 30

Add '-90' to each side of the equation.
90 + -90 + -3n = 30 + -90

Combine like terms: 90 + -90 = 0
0 + -3n = 30 + -90
-3n = 30 + -90

Combine like terms: 30 + -90 = -60
-3n = -60

Divide each side by '-3'.
n = 20

Simplifying
n = 20

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