How do you solve the system #y=1/2x+4# and #y=-4x-5# by graphing?
The equations are in standard form,
The solution of this set of simultaneous linear equations is the point where the lines cross.
You can read from the graph that this point is
The equations can also be solved algebraically (as a way of checking your answer) by equating the two equations with one another:
Double to make it neater:
Substitute back into either equation to find