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18=d/7+13
We simplify the equation to the form, which is simple to understand
18=d/7+13
We move all terms containing d to the left and all other terms to the right.
-0.14285714285714d=+13-18
We simplify left and right side of the equation.
-0.14285714285714d=-5
We divide both sides of the equation by -00.14285714285714 to get d.
d=35.000000000001
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