(9y-7)-(y+9)=

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Solution for (9y-7)-(y+9)= equation:


Simplifying
(9y + -7) + -1(y + 9) = 0

Reorder the terms:
(-7 + 9y) + -1(y + 9) = 0

Remove parenthesis around (-7 + 9y)
-7 + 9y + -1(y + 9) = 0

Reorder the terms:
-7 + 9y + -1(9 + y) = 0
-7 + 9y + (9 * -1 + y * -1) = 0
-7 + 9y + (-9 + -1y) = 0

Reorder the terms:
-7 + -9 + 9y + -1y = 0

Combine like terms: -7 + -9 = -16
-16 + 9y + -1y = 0

Combine like terms: 9y + -1y = 8y
-16 + 8y = 0

Solving
-16 + 8y = 0

Solving for variable 'y'.

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

Add '16' to each side of the equation.
-16 + 16 + 8y = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 8y = 0 + 16
8y = 0 + 16

Combine like terms: 0 + 16 = 16
8y = 16

Divide each side by '8'.
y = 2

Simplifying
y = 2

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