AB+BC+AC=103
AB=AC-18
AB=BC/3
AC-18+BC+AC=103
AC-18=BC/3
2AC+BC=121
3AC-BC=54
5AC=175
AC=35
3×35-BC=54
-BC=54-105
BC=51
AB=35-18
AB=17
AB=17 см, BC=51 см, AC=31 см
AB+BC+AC=103
AB=AC-18
AB=BC/3
AC-18+BC+AC=103
AC-18=BC/3
2AC+BC=121
3AC-BC=54
5AC=175
AC=35
3AC-BC=54
3×35-BC=54
-BC=54-105
BC=51
AB=35-18
AB=17
AB=17 см, BC=51 см, AC=31 см