a)
a, b=a+1 si c=a+2
a+b+c=60
a+(a+1)+(a+2)=60 ⇒ 3a+3=60⇒ 3a=60-3 ⇒ 3a=57 r⇒ a=57:3 ⇒ a=19.
Raspuns: a=19, b=a+1=20 si c=a+2=21
Numerele cautate
sunt 19, 20 si 21
Verificare: a+b+c=60, 19+20+21=60, 60=60
b)
a+b+c= 108
b=108 : 3⇒b=36
a=36 - 1⇒a=35
c=36 + 1⇒c=37
Raspuns: a=35, b=a+1=36 si c=a+2=37
Numerele cautate
sunt 35, 36 si 37
Verificare: a+b+c=108, 35+36+37=108, 108=108
