Algebra

To solve this problem, let's focus on the ways we can get x in the problem. 

First, we have x and 14. 

We get $14x$ from this. 

Next, we have 1 and $-23x$

Multiplying these two together, we get

$-23x$

Adding these two together, we get $14x-23x=-9x$

We could also expand everything out. Using the Distributive Property, we get

$x^{7}-7x^{6}+10x^{5}-13x^{4}+8x^{2}-9x+14$

Thus, the coefficient is -9. 

So our answer is -9. 

Thanks! :)