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Daca a supra b egal 2 supra 3 si b supra c egal 3,calculati a supra c?

Răspuns :

a/b=2/3
b/c=3
_________
2b=3a
b=3c
a=2b/3
c=b/3
a/c=(2b/3) / (b/3)
a/c=2
a/b = 2/3    = > a = 2b/3 
b/c = 3   = > c = b/3 

a/c = 2b/3 : b/3 = 2b/3 x 3/b = 2