-30-3y=-21

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Solution for -30-3y=-21 equation: 


Simplifying
-30 + -3y = -21

Solving
-30 + -3y = -21

Solving for variable 'y'.

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

Add '30' to each side of the equation.
-30 + 30 + -3y = -21 + 30

Combine like terms: -30 + 30 = 0
0 + -3y = -21 + 30
-3y = -21 + 30

Combine like terms: -21 + 30 = 9
-3y = 9

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

Simplifying
y = -3

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