Question 741053
{{{x=2y-8}}}
so...
{{{y=(1/2)x+4}}}


{{{4x+y=13}}}
so...
{{{13-y=4x}}}
so...
{{{4x=13-y}}}
so...
{{{4x=-y+13}}}
so...
{{{-y=4x-13}}}
so...
{{{y=-4x+13}}}
Now to graph...
{{{ graph( 1000, 1000, -20, 20, -20, 20, (1/2)x+4, -4x+13) }}}
And we get an answer of (2, 5).
Let's check.


2=2(5)-8
2=10-8
2=2 YEP!


4(2)+5=13
8+5=13
13=13 YEP!


So the answer really is (2, 5).