Dear friend,
i need your help to confirm my ans which is difference with the book ans.
Tq for your kind help & time
The book is correct. Your error is where you combine terms into the quadratic about half-way down the page: you should have $\displaystyle 8x^2-15x+6=0$. I would advise that you always double-check your answers - substitute your final answers for x and y into the original two equations and see if they work.