a+b+c=48
c=2a
b=3a
a+3a+2a=48
6a=48
a=48:6 => a=8
c=2x8 => c=16
b=3x8 => b=24
Verificam: 8+24+16=48 (metoda algebrica)
metoda figurativa
a+b+c=48
c=2a
b=3a
a=1segment
b=3segmente } 48
c=2segmente
48:6(segmente)=8(a)
b=3x8 => b=24
c=2x8 => c=16
Verificam: a+b+c=8+24+16=48