(2n-4)+(n+1)=90

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Solution for (2n-4)+(n+1)=90 equation:


Simplifying
(2n + -4) + (n + 1) = 90

Reorder the terms:
(-4 + 2n) + (n + 1) = 90

Remove parenthesis around (-4 + 2n)
-4 + 2n + (n + 1) = 90

Reorder the terms:
-4 + 2n + (1 + n) = 90

Remove parenthesis around (1 + n)
-4 + 2n + 1 + n = 90

Reorder the terms:
-4 + 1 + 2n + n = 90

Combine like terms: -4 + 1 = -3
-3 + 2n + n = 90

Combine like terms: 2n + n = 3n
-3 + 3n = 90

Solving
-3 + 3n = 90

Solving for variable 'n'.

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

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

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

Combine like terms: 90 + 3 = 93
3n = 93

Divide each side by '3'.
n = 31

Simplifying
n = 31

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