Răspuns:
Explicație pas cu pas:
a+b+c=9878
a=b/4
c=b/2+15 ⇒ b/4+b+b/2+15=9878⇒ b+4b+2b+60=9878×4⇒
7b=39452 b=5636
a=5636:4=1409
c=5636:2+15=2833
a=b/4=> b=4a
c=b/2+15=>c=4a/2+15=>=2a+15
a+4a+2a+15=9878
7a=9878-15
7a=9863=>a=9863:7=>a=1409
b=4a=>b=4 ori1409=>b=5636
c=2a+15=>c=2 ori 1409+15=>c=2833
