8=9-y

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Solution for 8=9-y equation: 


Simplifying
8 = 9 + -1y

Solving
8 = 9 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
8 + y = 9 + -1y + y

Combine like terms: -1y + y = 0
8 + y = 9 + 0
8 + y = 9

Add '-8' to each side of the equation.
8 + -8 + y = 9 + -8

Combine like terms: 8 + -8 = 0
0 + y = 9 + -8
y = 9 + -8

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

Simplifying
y = 1

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