-21=3y-21

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Solution for -21=3y-21 equation:


Simplifying
-21 = 3y + -21

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

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

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

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

Solving
0 = 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.
0 + -3y = 3y + -3y
Remove the zero:
-3y = 3y + -3y

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

Divide each side by '-3'.
y = 0

Simplifying
y = 0

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