Explanation:
what they want you to do is draw the 2 lines, and the point, where they cross, that is the solution to the system.
that is all.
I cannot draw here.
but how do you draw a line ? by finding 2 points in the line, and then draw the line through them.
you can pick any x value to get points on a line.
the first I would always pick is x = 0.
then y of line one is 2×0 + 1 = 1.
and y of line two is 0 - 3 = -3
and then, to get a little bit distance between the points, I would go with x=2.
and y of line one is 2×2 + 1 = 5.
y of line two is 2 - 3 = -1
so, the points are for line one
(0, 1) and (2, 5)
and for line two
(0, -3) and (2, -1)
and when you draw the lines, you will find that their crossing point is at x = -4 with y for both lines -7.
so the solution is (-4, -7).