(y+15)=3(y-1)

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Solution for (y+15)=3(y-1) equation: 


Simplifying
(y + 15) = 3(y + -1)

Reorder the terms:
(15 + y) = 3(y + -1)

Remove parenthesis around (15 + y)
15 + y = 3(y + -1)

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

Solving
15 + y = -3 + 3y

Solving for variable 'y'.

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

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

Combine like terms: y + -3y = -2y
15 + -2y = -3 + 3y + -3y

Combine like terms: 3y + -3y = 0
15 + -2y = -3 + 0
15 + -2y = -3

Add '-15' to each side of the equation.
15 + -15 + -2y = -3 + -15

Combine like terms: 15 + -15 = 0
0 + -2y = -3 + -15
-2y = -3 + -15

Combine like terms: -3 + -15 = -18
-2y = -18

Divide each side by '-2'.
y = 9

Simplifying
y = 9

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