Question

quero o valor do x e o valor do y
A) x+y=10
x-y=4

B) 3x+2y=o
3x+y=27

C) 2x+y=2
x+y=3

D)2x-3y=5
5x+6y=26

E) x-7y=12
x+5y=0

F)x+2y=1
x-4y=13

G) x+y=80
x-y=24

Answer 1

A)

2x=14
x=7
x+y=10
7+y=10
y=10-7
y=3 

S=(7,3)