Răspuns :
a+b+c=120
b=3*a ⇒ a= b/3
b= c-50; ⇒ c= 50+b
inlocuim :
b/3+b+50+b=120
b+3b+150+3b=360
7b=360-150
7b= 210
b=210:7
b= 30
a= b/3
a=30:3
a=10
c= 50+b
c=50+30
c=80
10+30+80=120
b=3*a ⇒ a= b/3
b= c-50; ⇒ c= 50+b
inlocuim :
b/3+b+50+b=120
b+3b+150+3b=360
7b=360-150
7b= 210
b=210:7
b= 30
a= b/3
a=30:3
a=10
c= 50+b
c=50+30
c=80
10+30+80=120
a+b+c=120
b=3a
c=3a+50
a+3a+3a+50=120
7a=120-50=70
a=70:7=10
b=10x3=30
c=10x3+50=80
b=3a
c=3a+50
a+3a+3a+50=120
7a=120-50=70
a=70:7=10
b=10x3=30
c=10x3+50=80