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Dacă x/y = 3/2 , calculati : a) x+y/x b) 4x-y / x

Răspuns :

a)
(x+y)/x=x/x+y/x=1+1/(x/y)=1+1/(3/2)=1+2/3=5/3.

b)
(4x-y)/x=4*(x/x)-y/x=4-1/(x/y)=4-1/(3/2)=4-2/3=10/3.