Question

How do you solve for y in `2y+8x=4`?

Answer 1

You can't; as the equation involves two variables, it takes another dissimilar equation to provide an intersection point

Explanation:

The most you can do with the equation is expressing `x` in terms of `y`:
`2y+8x=4`
`2y=-8x+4`
`y=-4x+2`
However, this only provides the Cartesian equation for a line; simply put, as it is a line, there are infinite values for x, which would correspond to infinite values for y that would satisfy the equation.