Question

dado o sistema {×+y=12 2×+4y=34,ovalorde×.y e​

Answer 1

Resposta:

$x + y = 12 \\ 2x + 4y = 34 \\ \\ 2x + 2y = 24 \\ 2x + 4y = 34 \\ \\ - 2y = - 10 \\ y = \frac{10}{2} = 5 \\ \\ x + 5 = 12 \\ x = 12 - 5 \\ x = 7 \\ \\ x \times y = 7 \times 5 = 35$