3d-9=12

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Solution for 3d-9=12 equation:


3d-9=12

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

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

We simplify left and right side of the equation. 
+3d=+21

We divide both sides of the equation by 3 to get d. 
d=7

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