9(y+8)=8y-9

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Solution for 9(y+8)=8y-9 equation:


Simplifying
9(y + 8) = 8y + -9

Reorder the terms:
9(8 + y) = 8y + -9
(8 * 9 + y * 9) = 8y + -9
(72 + 9y) = 8y + -9

Reorder the terms:
72 + 9y = -9 + 8y

Solving
72 + 9y = -9 + 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.
72 + 9y + -8y = -9 + 8y + -8y

Combine like terms: 9y + -8y = 1y
72 + 1y = -9 + 8y + -8y

Combine like terms: 8y + -8y = 0
72 + 1y = -9 + 0
72 + 1y = -9

Add '-72' to each side of the equation.
72 + -72 + 1y = -9 + -72

Combine like terms: 72 + -72 = 0
0 + 1y = -9 + -72
1y = -9 + -72

Combine like terms: -9 + -72 = -81
1y = -81

Divide each side by '1'.
y = -81

Simplifying
y = -81

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