Question 859592
you have two lines and where they intersect is your solution
{{{ graph( 300, 200, -10, 10, -10, 10, -x -1, 2x + 14) }}}
the intersection is (-5,4)
check the answer
y = -x -1
4 = -(-5) - 1 = 4
y = 2x + 14
4 = 2*(-5) + 14 = 4
answer checks in both equations  :-)