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OpenStudy (atlchic):
Solve, r-1/r+1=3/5. Show work.
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OpenStudy (anonymous):
(r-4)/(r+1) = 0 (r-4)=0 r=4
OpenStudy (precal):
|dw:1337641353683:dw| cross multiply
OpenStudy (precal):
|dw:1337641405273:dw|
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