Question 452212
Graphs/452212: solve the system by graphing:
y=-x-2
y=2x+13
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        My vision is that the instruction "solve the system by graphing" looks slightly idiotic

        as considered to this problem. So, I will solve it in a normal way, i.e. algebraically.


        Notice that the post b @mananth does not contain any solution.



<pre>
Left sides of equations are identical - so, their right side equal

    -x - 2 = 2x + 13.


Simply and find x

    -x - 2x = 13 + 2,

      -3x   = 15,

        x   = 15/(-3) = -5.


Hence,  y = -x - 2 = -(-5) - 2 = 5 - 2 = 3.


<U>ANSWER</U>.  The solution is  x = -5, y = 3.


You may substitute these values into equations to assure that they are the correct solutions, 
i.e. do satisfy equations.
</pre>

Solved algebraically, i.e. in a normal way.