-3(y-5)=-21

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Solution for -3(y-5)=-21 equation: 


Simplifying
-3(y + -5) = -21

Reorder the terms:
-3(-5 + y) = -21
(-5 * -3 + y * -3) = -21
(15 + -3y) = -21

Solving
15 + -3y = -21

Solving for variable 'y'.

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

Add '-15' to each side of the equation.
15 + -15 + -3y = -21 + -15

Combine like terms: 15 + -15 = 0
0 + -3y = -21 + -15
-3y = -21 + -15

Combine like terms: -21 + -15 = -36
-3y = -36

Divide each side by '-3'.
y = 12

Simplifying
y = 12

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