Solve for d
d=8
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\frac{-126}{7}=-3d+6
Divide both sides by 7.
-18=-3d+6
Divide -126 by 7 to get -18.
-3d+6=-18
Swap sides so that all variable terms are on the left hand side.
-3d=-18-6
Subtract 6 from both sides.
-3d=-24
Subtract 6 from -18 to get -24.
d=\frac{-24}{-3}
Divide both sides by -3.
d=8
Divide -24 by -3 to get 8.
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