An x-intercept is namely a "solution" or "zero" or "root" often called, and when that happens, y = 0, just like with any other x-intercept.

so what is its x-intercept anyway?
The coefficient is the number, therefore -5 and -4,
The exponent of the first x is 1 and the second x is 2, if the 2 is meant as an exponent. The first exponent of y is 1 and 5e second y is 2
Y=1/3x+2
(-6,0)
(0,2)
(6,4)
5+4=9 9-2=7
7x(-2)= (-14)
your answer is -14