Answer: <em>K = 196</em>
Step-by-step explanation:
We are given the equation
, and we are also given the fact the the 91 is left when the value of x = -5. We have to find the value of k.
1. The first step is to substitute the x for -5.
2. After substituting the x for -5 in all places, ad<em> =91</em> to make it an equation because we know that 91 will remain. After that, simplify the equation.
<em>-4(-5) becomes 20 because multiplying a negative factor by itself or another negative factor makes the product a positive.</em>
<em />
3. Once finished simplifying, add 105 to both sides of the equation in order to get the variable by itself.
1. 

2.


3. <u>-105</u> + k =<u> 91</u>
+105 +105

Hope this helps!