Question

if 15x + 17y = 21, 17x + 15y = 11
then value of x - y is....​

Answer 1

Step-by-step explanation:

Let us consider the equation

15x+17y=21 .........(1)

17x+15y=11..........(2)

subtracting equation (1) and equation (2) , we get

-2x+2y=10.........(3)

taking 2 as common factor from equation (3), we get

-x+y =5..........(4)

multiplying equation (4) by (-) , we get

x-y= -5

Answer 2

Answer:

I hope it helps you....

peace ✌☺️