the question i've got is:

find the exact value of the x-coordinate at each of the points of intersection of the following:

the line $\displaystyle 3x + 4y = 9$ and the curve $\displaystyle y = 3x^2 - 7x + 2$

i've got it down to $\displaystyle \frac{25}{4} \pm \sqrt {\frac{673}{16}}$ but i'm not sure how to complete it. any help would be appreciated. thanks