Răspuns :
Fie a,b,c cele trei numere
a+b+c=340
b=3a+10
c=2b+10=6a+30
10a+40=340 <=> 10a=300 <=> a=30
b=3*30+10=100
c=2*100+10=210
Cele trei numere sun 30, 100, 210
Verificare:30+100+210=340
a+b+c=340
b=3a+10
c=2b+10=6a+30
10a+40=340 <=> 10a=300 <=> a=30
b=3*30+10=100
c=2*100+10=210
Cele trei numere sun 30, 100, 210
Verificare:30+100+210=340
a+b+c=340
b=3a+10
c=2b+10=>6a+30
10a+40=340
10a=340-40
10a=300
a=300:10
a=30
b=3x30+10
b=90+10
b=100
c=2X100+10
c=200+10
c=210
R:a=30,b=100,c=210
b=3a+10
c=2b+10=>6a+30
10a+40=340
10a=340-40
10a=300
a=300:10
a=30
b=3x30+10
b=90+10
b=100
c=2X100+10
c=200+10
c=210
R:a=30,b=100,c=210