Resposta :

Tainara = x
Mara = 2x - 10
Eliana = 2x + 30

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

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