Solve the system of linear equations using a graph

draw both functions in one graph. they will look like the one I appended.

The point (x,y) where they cross (unless they are parallel and never cross) is the solution.

Read off the solution.

The solution is (-6, 17). You can verify by plugging that into the equations.

if you need , reply with more info. u.

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)