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-11=4+d/3
We simplify the equation to the form, which is simple to understand
-11=4+d/3
We move all terms containing d to the left and all other terms to the right.
-0.33333333333333d=+4+11
We simplify left and right side of the equation.
-0.33333333333333d=+15
We divide both sides of the equation by -00.33333333333333 to get d.
d=-45
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