Question

Resolva os sistemas, resposta completa.
x-3y=9
2x+3y=6
e
2x+y=-3
x+y=-1

Answer 1

Resposta:

x-3y=9

2x+3y=6

3x=15

x=15/3

x=5

e

2x+y=-3

x+y=-1 .(1)

2x+y=-3

x-y=-1

3x=-4

x=-4/3