Ex 18:
{n;m;p}d.p{3;7;11}
n/2=m/7=p/11=k
n=3k}3k+7k+11k =420
m=7k}21k=420:21
p=11k}k=20
[tex]n = 3 \times 20 = 60[/tex]
[tex]m = 7 \times 20 = 140[/tex]
[tex]p = 11 \times 20 = 220[/tex]
Ex:19
[tex]a = primul \: cadou \\ b = al \: doilea \: cadou \\ c = al \: treilea \: cadou \\ d = al \: patrulea \: cadou[/tex]
[tex]a = 3k \\ b = 3.2k \\ c = 3.3k \\ d = 3.5k \\ [/tex]
3k+3,2k+3,3k+3,5k=13k
[tex]13k = 130 \\ k = 130 \div 13 \\ k = 10 \\ a = 3 \times 10 = 30lei(primul \: cadou) \\ b = 3.2 \times 10 = 32lei(al \: doilea \: cadou) \\ c = 3.3 \times 10 = 33lei(al \: treilea cadou) \\ d = 3.5 \times 10 = 35lei \: (al \: patrulea \: cadou)[/tex]
Sper ca te-am ajutat! ❤️
