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1/2d-10=3
We simplify the equation to the form, which is simple to understand
1/2d-10=3
We move all terms containing d to the left and all other terms to the right.
+2d=+3+10
We simplify left and right side of the equation.
+2d=+13
We divide both sides of the equation by 2 to get d.
d=6.5
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