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10+20/2*5=d
We simplify the equation to the form, which is simple to understand
10+20/2*5=d
We move all terms containing d to the left and all other terms to the right.
-1d=-10-2
We simplify left and right side of the equation.
-1d=-12
We divide both sides of the equation by -01 to get d.
d=12
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