-9-(-12)=-3y-y

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Solution for -9-(-12)=-3y-y equation:


-9-(-12)=-3y-y

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

Remove unnecessary parentheses
-9+12=-3y-y

We move all terms containing y to the left and all other terms to the right. 
+3y+1y=+9-12

We simplify left and right side of the equation. 
+4y=-3

We divide both sides of the equation by 4 to get y. 
y=-0.75

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