2y-x=90

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Solution for 2y-x=90 equation: 


Simplifying
2y + -1x = 90

Reorder the terms:
-1x + 2y = 90

Solving
-1x + 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.
-1x + 2y + -2y = 90 + -2y

Combine like terms: 2y + -2y = 0
-1x + 0 = 90 + -2y
-1x = 90 + -2y

Divide each side by '-1'.
x = -90 + 2y

Simplifying
x = -90 + 2y

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