9y+9=9y-y

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


Simplifying
9y + 9 = 9y + -1y

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

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

Solving
9 + 9y = 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
9 + 9y + -8y = 8y + -8y

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

Combine like terms: 8y + -8y = 0
9 + 1y = 0

Add '-9' to each side of the equation.
9 + -9 + 1y = 0 + -9

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

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

Divide each side by '1'.
y = -9

Simplifying
y = -9

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