Solve for d
d=1
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-2+6d-4d=0
Subtract 4d from both sides.
-2+2d=0
Combine 6d and -4d to get 2d.
2d=2
Add 2 to both sides. Anything plus zero gives itself.
d=\frac{2}{2}
Divide both sides by 2.
d=1
Divide 2 by 2 to get 1.
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