-3(y+2)+12=21

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Solution for -3(y+2)+12=21 equation: 


Simplifying
-3(y + 2) + 12 = 21

Reorder the terms:
-3(2 + y) + 12 = 21
(2 * -3 + y * -3) + 12 = 21
(-6 + -3y) + 12 = 21

Reorder the terms:
-6 + 12 + -3y = 21

Combine like terms: -6 + 12 = 6
6 + -3y = 21

Solving
6 + -3y = 21

Solving for variable 'y'.

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

Add '-6' to each side of the equation.
6 + -6 + -3y = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -3y = 21 + -6
-3y = 21 + -6

Combine like terms: 21 + -6 = 15
-3y = 15

Divide each side by '-3'.
y = -5

Simplifying
y = -5

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