Solve for r
r=-8
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\frac{224}{-7}=3r-8
Divide both sides by -7.
-32=3r-8
Divide 224 by -7 to get -32.
3r-8=-32
Swap sides so that all variable terms are on the left hand side.
3r=-32+8
Add 8 to both sides.
3r=-24
Add -32 and 8 to get -24.
r=\frac{-24}{3}
Divide both sides by 3.
r=-8
Divide -24 by 3 to get -8.
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