Question

Qual o resultado desses sistemas de equações?

a) x+3y=1
2x-3y=8

b) x+2y=7
4x-y=10

c) -5x+y= 3
7x+ 2y= -11

d) x y
--- + --- = 6
2 3

x-y= -3

Answer 1

a) (x=7; y= -2/3)
b) ( x=3; y=2)
c) (x= -1; y= -2)