Question 113282
{{{4x-x-1=19}}}  You have one little 'oops' right here.  It should be {{{4x-(x-1)=19}}}
{{{3x-1=19}}} That makes this look like: {{{3x+1=19}}}
{{{3x=20}}}   So {{{3x=18}}}
x=6 and 2/3,  So {{{x=6}}}


You also need to substitute your newly found value for x back into one of the original equations to solve for y.


{{{y=x-1}}}
{{{y=6-1=5}}}


So the point of intersection of the two lines is (6,5)


Hope this helps,
John