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d/(-4)+3=15
We simplify the equation to the form, which is simple to understand
d/(-4)+3=15
Reorder the terms in parentheses
+(-0.25d)+3=15
Remove unnecessary parentheses
-0.25d+3=+15
We move all terms containing d to the left and all other terms to the right.
-0.25d=+15-3
We simplify left and right side of the equation.
-0.25d=+12
We divide both sides of the equation by -0.25 to get d.
d=-48
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