9y+9=8y-7

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Solution for 9y+9=8y-7 equation:


Simplifying
9y + 9 = 8y + -7

Reorder the terms:
9 + 9y = 8y + -7

Reorder the terms:
9 + 9y = -7 + 8y

Solving
9 + 9y = -7 + 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 = -7 + 8y + -8y

Combine like terms: 9y + -8y = 1y
9 + 1y = -7 + 8y + -8y

Combine like terms: 8y + -8y = 0
9 + 1y = -7 + 0
9 + 1y = -7

Add '-9' to each side of the equation.
9 + -9 + 1y = -7 + -9

Combine like terms: 9 + -9 = 0
0 + 1y = -7 + -9
1y = -7 + -9

Combine like terms: -7 + -9 = -16
1y = -16

Divide each side by '1'.
y = -16

Simplifying
y = -16

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