255-y=115

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Solution for 255-y=115 equation: 


Simplifying
255 + -1y = 115

Solving
255 + -1y = 115

Solving for variable 'y'.

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

Add '-255' to each side of the equation.
255 + -255 + -1y = 115 + -255

Combine like terms: 255 + -255 = 0
0 + -1y = 115 + -255
-1y = 115 + -255

Combine like terms: 115 + -255 = -140
-1y = -140

Divide each side by '-1'.
y = 140

Simplifying
y = 140

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