Question

How do you solve the system `x+y=4` and `x - y = -6` by graphing?

Answer 1

`(-1,5)`

Explanation:

Graph the `2` equations.

(It may be easier to think about them in `y=mx+b` form. These can be written as `y=-x+4` and `y=x+6`.)

Notice that they intersect at the point `(-1,5)`.

This is the only point which satisfies both equations.