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ex 23 si ex 24 daca puteți dau coroana pls!!!!

Ex 23 Si Ex 24 Daca Puteți Dau Coroana Pls class=

Răspuns :

23)... 8*a+8*b+8*c=72
72:8=9
9:3=3
a=3
b=3
c=3
24)...ab+bc+ca=10a+b+10b+c+10c+a=11b+11c+11a=11(a+b+c); ac+ba+cb=10a+c+10b+a+10c+b=11(a+b+c); 11(a+b+c)=11(a+b+c)=>ab + bc + ca = ac + ba + cb

8 ×(a+b+c)=72 =a+b+c=9=a=2=b=3=c=4