-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 = 6
-1y = 6

Divide each side by '-1'.
y = -6

Simplifying
y = -6

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