3(y+15)=21

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Solution for 3(y+15)=21 equation: 


Simplifying
3(y + 15) = 21

Reorder the terms:
3(15 + y) = 21
(15 * 3 + y * 3) = 21
(45 + 3y) = 21

Solving
45 + 3y = 21

Solving for variable 'y'.

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

Add '-45' to each side of the equation.
45 + -45 + 3y = 21 + -45

Combine like terms: 45 + -45 = 0
0 + 3y = 21 + -45
3y = 21 + -45

Combine like terms: 21 + -45 = -24
3y = -24

Divide each side by '3'.
y = -8

Simplifying
y = -8

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