Question

How do you solve the simultaneous equations `3x=2+2y` and `x=(2+2y)/3`?

Answer 1

You have the same 2 equations. These are two lines superimposed so they have `oo` common solutions.

Explanation:

You actually have the same equations but written in different ways.
You can substitute the second equation into the first for `x` to see that:
`cancel(3)color(red)((2+2y)/cancel(3))=2+2y`
Basically you have the same 2 lines superimposed one on the other.