Dado o sistema abaixo, qual o valor para xe y?

x + 2y = 14
3x - y

a) S = {(1,1)
a
entre
o
b) S = {(6,2))
6 c) S = {(2,6)
od) S = {(4,5))​

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.