Răspunsuri

2014-05-01T23:07:50+03:00
R+6    p+6
r+6=8(r+6-p-6)
r+6=8(r-p)
r+6=8r-8p

r+6-p-6=r/4
r-p=r/4  aducem la acelasi numitor
4r-4p=r
4r-r=4p
3r=4p
r=4p/3

4p/3  +6= 8( 4p/3 -p)  aducem la acelasi numitor
4p/3  +6=8* (4p-3p)/3
4p/3+6= 8* p/3
4p/3+6=  8p/3  aducem la acelasi numitor
4p+18=8p
4p-8p=-18
-4p=-18
4p=18
p=4 ani si jumatate (4,5)
r=4*4,5/3= 18/3=6 ani


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