4-0.4(3d)=12

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Solution for 4-0.4(3d)=12 equation:


4-0.4(3d)=12

We simplify the equation to the form, which is simple to understand 
4-0.4(3d)=12

Reorder the terms in parentheses
4+(-1.2d)=12

Remove unnecessary parentheses
+4-1.2d=+12

We move all terms containing d to the left and all other terms to the right. 
-1.2d=+12-4

We simplify left and right side of the equation. 
-1.2d=+8

We divide both sides of the equation by -1.2 to get d. 
d=-6.66666666667

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