X+(x-1)+(x+1)=90

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Solution for X+(x-1)+(x+1)=90 equation:


Simplifying
X + (x + -1) + (x + 1) = 90

Reorder the terms:
X + (-1 + x) + (x + 1) = 90

Remove parenthesis around (-1 + x)
X + -1 + x + (x + 1) = 90

Reorder the terms:
X + -1 + x + (1 + x) = 90

Remove parenthesis around (1 + x)
X + -1 + x + 1 + x = 90

Reorder the terms:
-1 + 1 + X + x + x = 90

Combine like terms: -1 + 1 = 0
0 + X + x + x = 90
X + x + x = 90

Combine like terms: x + x = 2x
X + 2x = 90

Solving
X + 2x = 90

Solving for variable 'X'.

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

Add '-2x' to each side of the equation.
X + 2x + -2x = 90 + -2x

Combine like terms: 2x + -2x = 0
X + 0 = 90 + -2x
X = 90 + -2x

Simplifying
X = 90 + -2x

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