40-y=x

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Solution for 40-y=x equation: 


Simplifying
40 + -1y = x

Solving
40 + -1y = x

Solving for variable 'y'.

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

Add '-40' to each side of the equation.
40 + -40 + -1y = -40 + x

Combine like terms: 40 + -40 = 0
0 + -1y = -40 + x
-1y = -40 + x

Divide each side by '-1'.
y = 40 + -1x

Simplifying
y = 40 + -1x

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