Question

qual o conjunto da soluçao racional do sistema:
(a){x+y=4
{x-y=1

Answer 1

Boa tarde.

x + y = 4

x - y = 1

___________

x + x = 4 + 1

2x = 5

x = 5/2

_____________

5/2 + y = 4

y = 4 - 5/2 = 8-5/2 = 3/2