90=n+n-10

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Solution for 90=n+n-10 equation:


Simplifying
90 = n + n + -10

Reorder the terms:
90 = -10 + n + n

Combine like terms: n + n = 2n
90 = -10 + 2n

Solving
90 = -10 + 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.
90 + -2n = -10 + 2n + -2n

Combine like terms: 2n + -2n = 0
90 + -2n = -10 + 0
90 + -2n = -10

Add '-90' to each side of the equation.
90 + -90 + -2n = -10 + -90

Combine like terms: 90 + -90 = 0
0 + -2n = -10 + -90
-2n = -10 + -90

Combine like terms: -10 + -90 = -100
-2n = -100

Divide each side by '-2'.
n = 50

Simplifying
n = 50

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