Question 754363
2x+3y=7 ...1
-x+4y=2 ...2
Multiply (2) by 2

 2x + 3y = 7 ....1
-2x + 8y = 4 ....3

Add (1) + (3)
      11y = 11
        y = 1
Substitute y = 1 in (1)
2x + 3y = 7
2x + 3(1) = 7
2x + 3   = 7
2x       = 7 - 3
      2x = 4
       x = 2

Your solution - {2,1}
Hope this helps
:-)