Question

If 2x-5y= -7 and 5x - 2y =14 then find valu of (x+y)​

Answer 1

Answer:

x=4 & y=3

Step-by-step explanation:

2x-5y=-7

or, 2x = -7+5y

or, x. =(5y-7)/2

Now,

in the 2nd equation,

5x-2y=14

or,5((5y-7)/2)-2y=14

or,25y-35-4y=14(2)

or,21y. = 28+35

or, y =63/21

or, y =3

so,

x=5y-7/2

or, x=(5x3-7)/2

or,x=(15-7)/2

or,x=8/2

or, x=4