Question

if 3x + 5y=9 and 5x+3y =7 then what is the value of x+y ?

Answer 1

this is the answer.......

Answer 2

3x+5y=9. equation-1. ×3
5x+3y=7. equation-2 ×5

9x+15y=27
25x+15y=35

now we will cut the 15y and 15y. And add the left equation .
34x =62


so,
$x = 62 \div 34$

x= 31/17

now we will take the equation 1 and put the value of x which is 31/17 then we get the value of y .
Then add x+y
thanks