Question 751896
hi,
I would use simultaneous equations:-

3x - y = 0......1
4x - y = 2......2

Subtract (1) from (2)

 x     = 2

Substitute x = 2 in (2)

4x - y = 2
4(2) - y = 2
 8   - y = 2
      -y = 2- 8
      -y = -6
       y = 6
  x = 2: y = 6

Hope this helps.
:-)