3(y-4)-3(y-9)=5(y+4)

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Solution for 3(y-4)-3(y-9)=5(y+4) equation:


Simplifying
3(y + -4) + -3(y + -9) = 5(y + 4)

Reorder the terms:
3(-4 + y) + -3(y + -9) = 5(y + 4)
(-4 * 3 + y * 3) + -3(y + -9) = 5(y + 4)
(-12 + 3y) + -3(y + -9) = 5(y + 4)

Reorder the terms:
-12 + 3y + -3(-9 + y) = 5(y + 4)
-12 + 3y + (-9 * -3 + y * -3) = 5(y + 4)
-12 + 3y + (27 + -3y) = 5(y + 4)

Reorder the terms:
-12 + 27 + 3y + -3y = 5(y + 4)

Combine like terms: -12 + 27 = 15
15 + 3y + -3y = 5(y + 4)

Combine like terms: 3y + -3y = 0
15 + 0 = 5(y + 4)
15 = 5(y + 4)

Reorder the terms:
15 = 5(4 + y)
15 = (4 * 5 + y * 5)
15 = (20 + 5y)

Solving
15 = 20 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
15 + -5y = 20 + 5y + -5y

Combine like terms: 5y + -5y = 0
15 + -5y = 20 + 0
15 + -5y = 20

Add '-15' to each side of the equation.
15 + -15 + -5y = 20 + -15

Combine like terms: 15 + -15 = 0
0 + -5y = 20 + -15
-5y = 20 + -15

Combine like terms: 20 + -15 = 5
-5y = 5

Divide each side by '-5'.
y = -1

Simplifying
y = -1

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