3y=21+6y

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Solution for 3y=21+6y equation: 


Simplifying
3y = 21 + 6y

Solving
3y = 21 + 6y

Solving for variable 'y'.

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

Add '-6y' to each side of the equation.
3y + -6y = 21 + 6y + -6y

Combine like terms: 3y + -6y = -3y
-3y = 21 + 6y + -6y

Combine like terms: 6y + -6y = 0
-3y = 21 + 0
-3y = 21

Divide each side by '-3'.
y = -7

Simplifying
y = -7

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