Explain to me and give me the answer explain using words or drawings how to write 6/9 in simplest form

1) I graphed the two equations on a same coordinate system.

2) You can do it if you create a talbe for each equation. You only need two points for each equation since they are linear functions (straight lines).

3) Ths solution of the system is the intersection point. You can read the coordinates of that point on the graph. They are x = - 18 and y = 11, i.e. point (-18,11).