3x -7 = 5x + 19
-7 = 2x + 19
-26 = 2x
x= -13 
        
                    
             
        
        
        
Answer:
a. Sage and Tom have the same number of talk minutes left on their cell phone plans.
b. y = x - 7
Explanation: 
Sage talked for 7 minutes with her dad. 
Tom talked for 4 minutes with a friend and 3 more minutes with his mom which means he spoke for :
= 4 + 3 
= 7 minutes 
They both spoke for 7 minutes and therefore have the same amount of time left. 
Algebraic expression:
Assuming the time Tom started with is denoted by x and the time he is left with is denoted by y. 
The expression is:
y = x - 7
 
        
             
        
        
        
You havent added the options