To solve an equation graphically, you need to plot the graph on graph paper and then find the points of intersection (points where both lines meet), which is your answer.
You can't solve it using simultaneous equations.
To plot the graph, you need to make a table of values for x, substitute the random values of x into one equation, find the points that the line touches, and draw the line from the table.
Once you are done drawing both lines, just identify the point at which both lines meet and that's your answer.
NOTE: IF ALL THIS IS TOO CONFUSING, GO TO THE WEBSITE CALLED "DESMOS" AND TYPE IN THE EQUATIONS. IT PLOTS THE GRAPH FOR YOU. ALL YOU NEED TO DO IS FIND THE POINT WHERE BOTH LINES MEET FROM THERE
