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40.00-d=2.43
We simplify the equation to the form, which is simple to understand
40.00-d=2.43
We move all terms containing d to the left and all other terms to the right.
-1d=+2.43-40
We simplify left and right side of the equation.
-1d=-37.57
We divide both sides of the equation by -1 to get d.
d=37.57
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