-21=3y-3

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Solution for -21=3y-3 equation:


Simplifying
-21 = 3y + -3

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

Solving
-21 = -3 + 3y

Solving for variable 'y'.

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

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

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

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

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

Combine like terms: -3 + 21 = 18
-3y = 18

Divide each side by '-3'.
y = -6

Simplifying
y = -6

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