1-1y=9

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Solution for 1-1y=9 equation: 


Simplifying
1 + -1y = 9

Solving
1 + -1y = 9

Solving for variable 'y'.

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

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

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

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

Divide each side by '-1'.
y = -8

Simplifying
y = -8

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