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Mathematics 10 Online
OpenStudy (anonymous):

which is J= 4rb solved for r? r = j/4b r = 4b/j r= j - 4b

OpenStudy (lucaz):

solving for r means isolate r, so on the right side of the equation you have 4rb, wich means r*(4b), if you divide both sides by 4b you isolate r: j/4b=r

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