90-y=x

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Solution for 90-y=x equation:


Simplifying
90 + -1y = x

Solving
90 + -1y = x

Solving for variable 'y'.

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

Add '-90' to each side of the equation.
90 + -90 + -1y = -90 + x

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

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

Simplifying
y = 90 + -1x

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