yes!

Now, you can find it easily.

4x+8y = 100........(1)

x + y = 20...........(2)

Now, multiply equation(2) by 4

4x+4y = 80...........(3)

Subtract equ(3) from (1)

4x+8y = 100

-4x -4y = -80

-------------------

4y =20

y =5

Put the value of y in equ(2)

x+5 =20

x =15

Thus. x=15 and y=5