Respostas

2013-09-25T22:02:43-03:00
Pacote 1=140
pacote 2=120
pacote 3=90
Total 350
2013-09-25T22:03:51-03:00
P3 + p2 + p1 = 350
x + x+30 + x+30 + 20 = 350
3x = 350 - 30 - 30 - 20
3x = 270
x = 270/3
x = 90 reais
o pacote 1 custa 140
o pacote 2 custa 120
o pacote 3 custa 90