Question 164414
Since they both equal y, set them equal to each other.
{{{x+4=-2x+1}}}
{{{3x+4=1}}}
{{{3x=-3}}}
{{{x=-1}}}
From eq.1,
{{{y=x+4}}}
{{{y=-1+4}}}
{{{y=3}}}
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(-1,3) is the solution.
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Check the answer by graphing both lines and finding the intersection.
{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),circle( -1, 3, .2 ), graph( 300, 300, -5, 5, -5, 5, x+4, -2x+1)) }}}