Ajutor! Va rog! Dau coroana...
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Răspuns:
42-(2+3+4+5)
42-14=28
28:4=7
a=7+2
a=9
b=7+3
b=10
c=7+4
c=11
d=7+5
d=12
Verificat :9+10+11+12=42