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3d+8-d=2(d-7)
We simplify the equation to the form, which is simple to understand
3d+8-d=2(d-7)
Reorder the terms in parentheses
3d+8-d=+(+2d-14)
Remove unnecessary parentheses
+3d+8-d=+2d-14
We move all terms containing d to the left and all other terms to the right.
+3d-1d-2d=-14-8
We simplify left and right side of the equation.
d=-22
0=-22
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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