6+9(X- 1)= 13+8(Y- 1)

9X-3=8Y+5

Because 300

Y = (9/8) * x- 1 from 9x-3 = 8y+5。

Since y is an integer and (9/8) * X- 1 is an integer, X must be a multiple of 8, so X is 40.