Can you please attach an image so i can answer? Let me know when you do that and i’ll be glad to help!
If 7x+3=24, that means x would be 3 so if you take 5-4x then that would be -7.
There is one answer.
The intersecting points are (0, 5) just for the extra if you graph them both.
Answer:

Step-by-step explanation:
We are given that The monthly charge for a waste collection service is 1830 dollars for 100 kg of waste
So, 
We are also given that The monthly charge for a waste collection service is 2460 dollars for 135 kg of waste.
So, 
We are supposed to find a linear model for the cost, C, of waste collection as a function of the number of kilograms, w.
So, we will use two point slope form :
Formula : 
Substitute the values





y denotes the cost
x denotes the weight
So, Replace y with C and x with w

So, a linear model for the cost, C, of waste collection as a function of the number of kilograms, w is 