Solve for r
r=-3
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\frac{-168}{6}=8r-4
Divide both sides by 6.
-28=8r-4
Divide -168 by 6 to get -28.
8r-4=-28
Swap sides so that all variable terms are on the left hand side.
8r=-28+4
Add 4 to both sides.
8r=-24
Add -28 and 4 to get -24.
r=\frac{-24}{8}
Divide both sides by 8.
r=-3
Divide -24 by 8 to get -3.
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