Akeller27
solve n=4r for r



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mukushla
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well u must isolate r ... so i would say divide by 4 see what happens.

mukushla
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*divide both sides by 4

math456
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its easy.. divide 4 on both sides and u will be left with n/4=r

Akeller27
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so it would be n=4r

math456
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n/4=4r/4
here the 4r cancels with the 4 and u r left with r
so the answer will be r=n/4

Akeller27
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here are the choises
A r=4n
B r=4r
C r=n+4
D r=n/4

math456
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its D