Question

determinati numerele naturale a,b,c stiind ca a<b<c si ca 9×a+9×b+9×c =72

Answer 1

a<b<c

9×a+9×b+9×c=72

9(a+b+c)=72

a+b+c=8

a+b+c=1+2+5=8

a+b+c=1+3+4=8

(a;b;c)∈{(1;2;5); (1,3,4)}