21y=3y

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Solution for 21y=3y equation: 


Simplifying
21y = 3y

Solving
21y = 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.
21y + -3y = 3y + -3y

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

Combine like terms: 3y + -3y = 0
18y = 0

Divide each side by '18'.
y = 0

Simplifying
y = 0

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