How do I use a graph to solve the solution of the system of equations $y=−2x−4$ and $y+4=−2x$ ?

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Answer 1 · 2015-07-09T21:23:47

You graph the equations and see where they intersect.

Your equations are

$y = -2x-4$
$y+4 = -2x$

Let's rearrange these to

(1) $y = -2x-4$
(2) $y = -2x-4$

The two equations are identical.

You don't have to plot the graphs, because they coincide.

There is an infinite number of solutions.

How do I use a graph to solve the solution of the system of equations y=−2x−4y=−2x−4 and y+4=−2xy+4=−2x?