9y-2y=21

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Solution for 9y-2y=21 equation: 


Simplifying
9y + -2y = 21

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

Solving
7y = 21

Solving for variable 'y'.

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

Divide each side by '7'.
y = 3

Simplifying
y = 3

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