3(2y+1)=9(y-1)

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Solution for 3(2y+1)=9(y-1) equation:


Simplifying
3(2y + 1) = 9(y + -1)

Reorder the terms:
3(1 + 2y) = 9(y + -1)
(1 * 3 + 2y * 3) = 9(y + -1)
(3 + 6y) = 9(y + -1)

Reorder the terms:
3 + 6y = 9(-1 + y)
3 + 6y = (-1 * 9 + y * 9)
3 + 6y = (-9 + 9y)

Solving
3 + 6y = -9 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
3 + 6y + -9y = -9 + 9y + -9y

Combine like terms: 6y + -9y = -3y
3 + -3y = -9 + 9y + -9y

Combine like terms: 9y + -9y = 0
3 + -3y = -9 + 0
3 + -3y = -9

Add '-3' to each side of the equation.
3 + -3 + -3y = -9 + -3

Combine like terms: 3 + -3 = 0
0 + -3y = -9 + -3
-3y = -9 + -3

Combine like terms: -9 + -3 = -12
-3y = -12

Divide each side by '-3'.
y = 4

Simplifying
y = 4

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