X+2y=90

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Solution for X+2y=90 equation: 


Simplifying
X + 2y = 90

Solving
X + 2y = 90

Solving for variable 'X'.

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

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

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

Simplifying
X = 90 + -2y

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