Solve the system by graphing.
4x + 2y = 10
y = 4
First graph
Get some points on the line:
(0,5), (2,1), (3,-1)
Plot those and draw a line through them.
Now draw the other line on the same set of axes,
It is a horizontal line 4 units above the
x-axis:
Draw a vertical line through their point of intersection.
It cuts the x axis at x = 
and
the horizontal line cuts the y-axis at 4,
so the solution is
x = , y = 4, sometimes written
(x,y) = (,4)
Edwin
