Does anyone know

2x=8y=7

4x-2y=9

Assuming you mean 2x-8y=7, we can start by multiplying the first equation by - 2 and adding it to the second (to cross out the x), resulting in - 18y=-5. After that, we can divide both sides by - 18, resulting in y=5/18. Next, plugging that into 4x-2y=9, we have 4x-10/18=9. Adding 10/18 to both sides, we get 4x=9+10/18. After that, we can divide both sides by 4, resulting in x = (9+10/18) / 4=