-y-9=15

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Solution for -y-9=15 equation: 


Simplifying
-1y + -9 = 15

Reorder the terms:
-9 + -1y = 15

Solving
-9 + -1y = 15

Solving for variable 'y'.

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

Add '9' to each side of the equation.
-9 + 9 + -1y = 15 + 9

Combine like terms: -9 + 9 = 0
0 + -1y = 15 + 9
-1y = 15 + 9

Combine like terms: 15 + 9 = 24
-1y = 24

Divide each side by '-1'.
y = -24

Simplifying
y = -24

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