Question 1138685
<br>
Just a note to comment on the solution by the other tutor....<br>
In fact, you can NOT tell  from the graph that the solution to the pair of equations is (27/7,25/14).<br>
You CAN tell that the solution is APPROXIMATELY (4,2).<br>
So in fact, even though the problem says to solve the problem using the graphical method, the graphical method is not appropriate for the problem.