8-y-y=-1

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Solution for 8-y-y=-1 equation: 


Simplifying
8 + -1y + -1y = -1

Combine like terms: -1y + -1y = -2y
8 + -2y = -1

Solving
8 + -2y = -1

Solving for variable 'y'.

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

Add '-8' to each side of the equation.
8 + -8 + -2y = -1 + -8

Combine like terms: 8 + -8 = 0
0 + -2y = -1 + -8
-2y = -1 + -8

Combine like terms: -1 + -8 = -9
-2y = -9

Divide each side by '-2'.
y = 4.5

Simplifying
y = 4.5

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