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8.68-19.9d=-9.66-19.9d
We simplify the equation to the form, which is simple to understand
8.68-19.9d=-9.66-19.9d
We move all terms containing d to the left and all other terms to the right.
-19.9d+19.9d=-9.66-8.68
We simplify left and right side of the equation.
d=-18.34
0=-18.34
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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