3y-3=21

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Solution for 3y-3=21 equation: 


Simplifying
3y + -3 = 21

Reorder the terms:
-3 + 3y = 21

Solving
-3 + 3y = 21

Solving for variable 'y'.

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

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

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

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

Divide each side by '3'.
y = 8

Simplifying
y = 8

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