Equation for Kelli's earning = 20x + 100
Equation for Karl's earning = 25x + 50
Now, 20x +100 = 25x +50
25x-20x = 100-50
5x = 50
x = 10
So, your answer is 10 hours.
Hope this helps!
Answer: 
Step-by-step explanation:
Given
If the temperature falls by
in 3 hours
Present temperature is 
The difference in temperature i.e.

Temperature 3 hours ago is 
Step-by-step explanation:
1.

2.

this may help you(:
Answer:
c'est faux parce que 3 n'est pas un diviseur de 25 et c'est pour 15 so not all divisor of 25 sommes diviseur de 15