You need to add the two quadratics together...
x^2+11x-6+6x^2-3x+9
7x^2+8x+3
First we will change them on the same denominator which will be 12. If we do something to the denominator we must do the same to the numerator so :
For 1/3 we get 4/12 because (1/3)*4 = 4/12
And for 2/3 we get 8/12 because (2/3)*4 = 8/12
So 1/3 is the smaller fraction, 7/12 is in the middle and 2/3 is the bigger fraction.
The answer for 6x+2=14 is x=2.
I assume you're asking where it meets the y axis
In an equation the last number is the y intercept so I'm this case it would be 1