Question 23262
1st: x=4y-3
2nd: 3x+y = 0
Substitute 1st into 2nd to get:
 3(4y-3)+y =0
 12y-9+y=0
   13y = 9
     y = 9/13
Substitute into 1st to get:
   x = 4(9/13)-3
   x = 36/13 - 39/13
   x = -3/13

So, solution is x=-3/13; y= 9/13

Cheers,
Stan H.