Răspuns :
a+b+c=237
b+c=200
b=3a
________
b=3a => a = b/3
b/3 + 200 = 237 |-200
b/3 = 37
b=37•3
b= 111
b=3a
111=3a
a = 111÷3
a = 37
b+c=200
111+ c= 200
c = 200-111
c = 89
a+b+c=237
b+c=200
b=3a
________
b=3a => a = b/3
b/3 + 200 = 237 |-200
b/3 = 37
b=37•3
b= 111
b=3a
111=3a
a = 111÷3
a = 37
b+c=200
111+ c= 200
c = 200-111
c = 89