9y-12=20+y

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Solution for 9y-12=20+y equation:


Simplifying
9y + -12 = 20 + y

Reorder the terms:
-12 + 9y = 20 + y

Solving
-12 + 9y = 20 + 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.
-12 + 9y + -1y = 20 + y + -1y

Combine like terms: 9y + -1y = 8y
-12 + 8y = 20 + y + -1y

Combine like terms: y + -1y = 0
-12 + 8y = 20 + 0
-12 + 8y = 20

Add '12' to each side of the equation.
-12 + 12 + 8y = 20 + 12

Combine like terms: -12 + 12 = 0
0 + 8y = 20 + 12
8y = 20 + 12

Combine like terms: 20 + 12 = 32
8y = 32

Divide each side by '8'.
y = 4

Simplifying
y = 4

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