3(y-4)=15

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Solution for 3(y-4)=15 equation: 


Simplifying
3(y + -4) = 15

Reorder the terms:
3(-4 + y) = 15
(-4 * 3 + y * 3) = 15
(-12 + 3y) = 15

Solving
-12 + 3y = 15

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 + 12 + 3y = 15 + 12

Combine like terms: -12 + 12 = 0
0 + 3y = 15 + 12
3y = 15 + 12

Combine like terms: 15 + 12 = 27
3y = 27

Divide each side by '3'.
y = 9

Simplifying
y = 9

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