Question

Daca punctele A,B,C sunt coliniare, in aceasta ordina astfel incat AB=8cm si 5xBC=3xAC.Determinati AC ???

Answer 1

BC = AC - AB
BC = AC - 8 => AC = BC + 8
Inlocuim :
5BC = 3 X (BC+8)
5BC = 3BC + 24 | -3BC
2BC = +24
BC = 24 :2
BC = 12 cm
AC = AB + BC
AC = 8+12
AC = 20

Daca vrei si verificare :

5 X 12 = 20 X 3