Question

b) (3x+y=5
(2x+y=4

obrigado​

Answer 1

Resposta:

$3x + y = 5 \\ 2x + y = 4 \\ \\ y = 5 - 3x \\ 2x + (5 - 3x) = 4 \\ \\ y = 5 - 3x \\ 2x + 5 - 3x = 4 \\ \\ y = 5 - 3x \\ - x = - 1 \\ \\ y = 5 - 3(1) \\ x = 1 \\ \\ y = 5 - 3 \\ x = 1 \\ \\ y = 2 \\ x = 1$