Răspuns :
Calculezi a+b+a+c+b+c=148+120+132
2a+2b+2c=400/:2
a+b+c=200
c=200-148=52
a=120-52=68
b=148-68=80
2a+2b+2c=400/:2
a+b+c=200
c=200-148=52
a=120-52=68
b=148-68=80
a+b =148
a +c=120
b+c=132
a+a+b+b+c+c=400
a+b+c=200
200-148=52(c)
200-120=80(b)
200-52-80=68