(Y-3)-(y+9)=8y

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Solution for (Y-3)-(y+9)=8y equation:


Simplifying
(Y + -3) + -1(y + 9) = 8y

Reorder the terms:
(-3 + Y) + -1(y + 9) = 8y

Remove parenthesis around (-3 + Y)
-3 + Y + -1(y + 9) = 8y

Reorder the terms:
-3 + Y + -1(9 + y) = 8y
-3 + Y + (9 * -1 + y * -1) = 8y
-3 + Y + (-9 + -1y) = 8y

Reorder the terms:
-3 + -9 + Y + -1y = 8y

Combine like terms: -3 + -9 = -12
-12 + Y + -1y = 8y

Solving
-12 + Y + -1y = 8y

Solving for variable 'Y'.

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

Add '12' to each side of the equation.
-12 + Y + 12 + -1y = 12 + 8y

Reorder the terms:
-12 + 12 + Y + -1y = 12 + 8y

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

Add 'y' to each side of the equation.
Y + -1y + y = 12 + 8y + y

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

Combine like terms: 8y + y = 9y
Y = 12 + 9y

Simplifying
Y = 12 + 9y

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