Solve for d
d=-3
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-7d-5+5d=1
Add 5d to both sides.
-2d-5=1
Combine -7d and 5d to get -2d.
-2d=1+5
Add 5 to both sides.
-2d=6
Add 1 and 5 to get 6.
d=\frac{6}{-2}
Divide both sides by -2.
d=-3
Divide 6 by -2 to get -3.
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