9-y=30

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Solution for 9-y=30 equation: 


Simplifying
9 + -1y = 30

Solving
9 + -1y = 30

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 = 30 + -9

Combine like terms: 9 + -9 = 0
0 + -1y = 30 + -9
-1y = 30 + -9

Combine like terms: 30 + -9 = 21
-1y = 21

Divide each side by '-1'.
y = -21

Simplifying
y = -21

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