Răspuns :
I-------I-------I-------I-------I-------I ⇒primul nr
I-------I-------I-------I-------I-------I+7I ⇒al doilea nr
I-------I ⇒al treilea nr
S=139
139-7=132
132:11=12 (al treilea nr)
12x5=60 (primul nr)
60+7=67 (al doilea nr)
I-------I-------I-------I-------I-------I+7I ⇒al doilea nr
I-------I ⇒al treilea nr
S=139
139-7=132
132:11=12 (al treilea nr)
12x5=60 (primul nr)
60+7=67 (al doilea nr)
a+b+c=139
a=5c
a=b-7⇒b=a+7⇒b=5c+7
5c+5c+7+c=139
11c=139-7
11c=132
c=132:11
c=12
a=5*12
a=60
b=5*12+7
b=67
V:60+67+12=139
a=5c
a=b-7⇒b=a+7⇒b=5c+7
5c+5c+7+c=139
11c=139-7
11c=132
c=132:11
c=12
a=5*12
a=60
b=5*12+7
b=67
V:60+67+12=139