3y-9=21

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Solution for 3y-9=21 equation:


3y-9=21

We simplify the equation to the form, which is simple to understand 
3y-9=21

We move all terms containing y to the left and all other terms to the right. 
+3y=+21+9

We simplify left and right side of the equation. 
+3y=+30

We divide both sides of the equation by 3 to get y. 
y=10

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