J=amount Jake has; F=amount Fred has=2J
J+F=$54
J+2J=$54
3J=$54
J=$18
ANSWER 1: Jake has $18.
F=2J=2($18)=$36 ANSWER 2: Fred has $36.
 
        
             
        
        
        
First you had subtract by ten from both sides of equation form.

Then simplify by equation.

Final answer: 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day. 
-Charlie
 
        
             
        
        
        
Answer:
29.3 hours overtime
Step-by-step explanation:
450-300= 150
150/5.12= 29.3