9y=2y-21

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Solution for 9y=2y-21 equation: 


Simplifying
9y = 2y + -21

Reorder the terms:
9y = -21 + 2y

Solving
9y = -21 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
9y + -2y = -21 + 2y + -2y

Combine like terms: 9y + -2y = 7y
7y = -21 + 2y + -2y

Combine like terms: 2y + -2y = 0
7y = -21 + 0
7y = -21

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

Simplifying
y = -3

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