Question

x+3y=5
2x-y=-4
preciso da resposta pfvr​

Answer 1

X+3y=5
2x-y= -4

X= 5-3y

2(5-3y)-y=-4
10-6y-y=-4
14=7y
Y=2

X+3.2=5
X=-1

Answer 2

$x + 3y = 5 \\ x + 3y - 3y = 5 - 3y \\ {x = 5 - 3y} \\ \\ 2x - y = - 4 \\ 2x - y + y = - 4 + y \\ 2x = - 4 + y \\ \frac{2x}{2} = - \frac{4}{2} + \frac{y}{2} \\\\\ {x = \frac{ -4 + y}{2} }$