n+(n-6)=90

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Solution for n+(n-6)=90 equation:


Simplifying
n + (n + -6) = 90

Reorder the terms:
n + (-6 + n) = 90

Remove parenthesis around (-6 + n)
n + -6 + n = 90

Reorder the terms:
-6 + n + n = 90

Combine like terms: n + n = 2n
-6 + 2n = 90

Solving
-6 + 2n = 90

Solving for variable 'n'.

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

Add '6' to each side of the equation.
-6 + 6 + 2n = 90 + 6

Combine like terms: -6 + 6 = 0
0 + 2n = 90 + 6
2n = 90 + 6

Combine like terms: 90 + 6 = 96
2n = 96

Divide each side by '2'.
n = 48

Simplifying
n = 48

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