Respostas

2013-10-28T16:40:50-02:00
Tainara = x
Mara = 2x - 10
Eliana = 2x + 30

2013-10-28T16:47:18-02:00
Tainara = x
Mara = 2x-10
Eliana = 2x-10+40

x+2x-10+2x-10+40
5x=-20+40
5x=20/5
x=4

Tainara = 4
Mara = -2
Eliana = 28