3y-12=4y+9

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Solution for 3y-12=4y+9 equation:


3y-12=4y+9

We simplify the equation to the form, which is simple to understand 
3y-12=4y+9

We move all terms containing y to the left and all other terms to the right. 
+3y-4y=+9+12

We simplify left and right side of the equation. 
-1y=+21

We divide both sides of the equation by -1 to get y. 
y=-21

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