Răspuns :
a + b +c = 68
b = a+5
a= 3c
68 = a+b+c
68=3c+3c+c+5
68-5=7c
63=7c
c=9
a = 9*3 => a=27
b=27+5
b=32
b = a+5
a= 3c
68 = a+b+c
68=3c+3c+c+5
68-5=7c
63=7c
c=9
a = 9*3 => a=27
b=27+5
b=32