Solve for d
d=2
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3d-5d+8=2d
Combine 4d and -d to get 3d.
-2d+8=2d
Combine 3d and -5d to get -2d.
-2d+8-2d=0
Subtract 2d from both sides.
-4d+8=0
Combine -2d and -2d to get -4d.
-4d=-8
Subtract 8 from both sides. Anything subtracted from zero gives its negation.
d=\frac{-8}{-4}
Divide both sides by -4.
d=2
Divide -8 by -4 to get 2.
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