-1=y+9

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Solution for -1=y+9 equation:


Simplifying
-1 = y + 9

Reorder the terms:
-1 = 9 + y

Solving
-1 = 9 + y

Solving for variable 'y'.

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

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

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

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 = 10
-1y = 10

Divide each side by '-1'.
y = -10

Simplifying
y = -10

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