Solve for r
r=1
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4r-7=-3
Swap sides so that all variable terms are on the left hand side.
4r=-3+7
Add 7 to both sides.
4r=4
Add -3 and 7 to get 4.
r=\frac{4}{4}
Divide both sides by 4.
r=1
Divide 4 by 4 to get 1.
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