Question

if x (y +2)= 100 and y (x +2)=60 then y - x =?

Answer 1

Answer:

If x (y +2)= 100 and y (x +2)=60 then y - x =20.

Step-by-step explanation:

x (y +2)= 100

xy + x(2)= 100

xy + 2x = 100------------ (1)

and y (x +2)=60

y(x) + y(2) = 60

xy + 2y = 60 -------(2)

Subtract (1) and (2), we get

   xy + 2x   = 100

-   xy + 2y = 60

______________

2x - 2y = 40

2(x - y) = 40

x - y = 40/2

x - y = 20

Si, if x (y +2)= 100 and y (x +2)=60 then y - x =20.