Ariel , oscar y Sebastian compraron ropa en una tienda , Ariel pago $2, 280 por dos pantalones , 3 camisas y 2 sacos ; Oscar pago $3, 095 por 3 pantalones , 5 camisas y 2 sacos , Sebastián pago $2, 08?

Primero asignamos incognitas a cada uno de los articulos

<img src="https://tex.z-dn.net/?f=pantalon%3Dp" />, <img src="https://tex.z-dn.net/?f=camisa%3Dc" />, <img src="https://tex.z-dn.net/?f=saco%3Ds" />

<img src="https://tex.z-dn.net/?f=Ariel%3B2p%2B3c%2B2s%3D2280" />

<img src="https://tex.z-dn.net/?f=Oscar%3B3p%2B5c%2B2s%3D3095" />

<img src="https://tex.z-dn.net/?f=Sebastian%3B2p%2B4c%2Bs%3D2080" />

<img src="https://tex.z-dn.net/?f=2p%2B3c%2B2s%3D2280" /> (1)

<img src="https://tex.z-dn.net/?f=3p%2B5c%2B2s%3D3095" /> (2)

<img src="https://tex.z-dn.net/?f=2p%2B4c%2Bs%3D2080" /> (3)

1

<img src="https://tex.z-dn.net/?f=2p%2B3c%2B2s%3D2280" /> * - 1 (1)

[img = 10] (2)

[img = 11] (1)

[img = 12] (2)

[img = 13] (4)

2

[img = 14] (2)

[img = 15] * - 2 (3)

[img = 16] (2)

[img = 17] (3)

[img = 18] (5)

3

[img = 19] (4)

[img = 20] (5)

[img = 21]

4

[img = 22] (4)

[img = 23]

[img = 24] (1)

[img = 25].