You can put this solution on YOUR website! Solve by graphing.
y = 3x - 4
y = -2x + 1
X........0............1.................2...........ETC................
Y=3X-4...-4...........-1.................2...........ETC
Y=-2X+1..1............-1.................-3........ETC.........
THE GRAPHS INTERSECT AT ONE POINT (1,-1).HENCE THEY ARE INDEPENDENT AND HAVE UNIQUE SOLUTION OF (1,-1)