Question

x+3y=7, 2x-y=0, ayuda por favor

Answer 1

Respuesta:

y=2 x=1

Explicación paso a paso:

$x + 3y = 7 \\ 2x - y = 0 \\ 2x = y \\ x = \frac{y}{2} \\ x + 3y = 7 \\ \frac{y}{2} + 3y = 7 \\ \frac{y}{2} + \frac{6y}{2} = 7 \\ \frac{7y}{2} = 7 \\ 7y = 2 \times 7 \\ 7y = 14 \\ y = \frac{14}{7} = 2 \\ y = 2$

$x + 3y = 7 \\ x + 3 \times 2 = 7 \\ x + 6 = 7 \\ x = 7 - 6 \\ x = 1$

$x + 3y = 7 \\ 1 + 3 \times 2 = 1 + 6 = 7 \\ 2x - y = 0 \\ 2 \times 1 - 2 = 2 - 2 = 0$

Espero te sirva