Question

if 2x+4y=13 and 4x+2 y=17 then find x+y​

Answer 1

Step-by-step explanation:

now we know the value of x as well as y,

now just do adding I. e. x+y=7/2+3/2=5

answer =5

Answer 2

Step-by-step explanation:

$\bold{given} \\ \: 2x + 4y = 13..........(1) \\ 4x + 2y = 17............(2) \\ multiply \: by \: 2 \: in \: eq(1). \\ 4x + 8y = 26......(3) \\ 4x + 2y = 17.........(2) \\ sustracting \: eq(3) \: nd \: (2) \\ 6y = 9 \\ y = \frac{9}{6} = \frac{3}{2} \\ \: puting \: value \: of \: y \: in \: eq(1) \\ 2x + 4 \times \frac{3}{2} = 13 \\ 2x = 13 - 6 \\ x = \frac{7}{2} = \\ \bold{ we \: find \: us \: x + y} \\ x + y = \frac{7}{2} + \frac{3}{2} = \frac{10}{2} = \frac{10}{2} = 5(ans)$