Solve for d
d=20
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-5+16d=315
Swap sides so that all variable terms are on the left hand side.
16d=315+5
Add 5 to both sides.
16d=320
Add 315 and 5 to get 320.
d=\frac{320}{16}
Divide both sides by 16.
d=20
Divide 320 by 16 to get 20.
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