Question

RESOLVA O SISTEMA:

x - y = 5
x/y = 7/2

$\left \{ {{x-y=5} \atop {\frac{x}{y} = \frac{7}{2}} \right. }}$

Answer 1

X= 5+ y

substituindo:

5+y/ y = 7/2

7y= 10 + 2y

7y-2y= 10

y=2

x=7