4x +  9y =   10 ------- eq (i)

   5x +  8y =   19 ------- eq (ii)

- 20x - 45y = - 50 ------ Multiplying eq (i) by - 5 ------ eq (iii)

  20x + 32y =   76 ------ Multiplying eq (i) by 4 -------- eq (iv)

      - 13y =   26 ------ Adding eqs (iv) & (iii)

          y = , or 

Substitute - 2 for y in either eq (i) or (ii) to determine the value of x

You should get a value of 

You can do the check!! 



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