1.
{a,b} i.p. {1/5,1,6}=>a/5=b/6=k
k=coeficient de proportionalitate
a/5=k=>a=5k
b/6=k=>b=6k
a+b=33
5k+6k=33
11k=33=>k=33÷11=>k=3
k=3=>a=5×3=15
k=3=>b=6×3=18
2.
{x,y} i.p. {3,2}=>3x=2y=k
3x=k=>x=k/3
2y=k=>y=k/2
y-x=42
k/2-k/3=42
*aducem la acelasi numitor
3k/6-2k/6=42
k/6=42
k=42×6
k=252
k=252=>x=252/3=84
k=252=>y=252/2=126
