Răspuns :
500+100=600 600:2 =300 al doilea nr. 300-100=200 primul nr. 200+300 =500
a+b=500
(a+100)=b
=>a+(a+100)=500=>
=>2a+100=500=>
=>2a=400=>
=>a=200=>
=>b=300
(a+100)=b
=>a+(a+100)=500=>
=>2a+100=500=>
=>2a=400=>
=>a=200=>
=>b=300