Răspuns :
a+b+c/3=43
a+b+c=129
a+b/2=50
a+b=100
100+c=129
c=129-100
c=29
a+b+c=129
a+b/2=50
a+b=100
100+c=129
c=129-100
c=29
a + b + c = 43 * 3
a + b + c = 129
a + b = 50 * 2
a + b = 100
100 + c = 129
c = 29
a + b + c = 129
a + b = 50 * 2
a + b = 100
100 + c = 129
c = 29