Answer:
15 
Step-by-step explanation:
we need to write the equation. I came up with....
3(5 - x) = 30
so take the 3 away from the 30. I think your not supose to do the 3 because it out of the ( ). the opppisite of multiplication is division. so...
3 divided by 30 =10
rewrite
(5 - x) = 10
take the 5 away. the oppisite of subbtraction is addition.
5 + 10 = 15
check your; plug in x
3(5 - 15) = 30  This equation looks true!
Hope this helped! Please mark as brainliest! Thanks
 
        
             
        
        
        
Answer:
About 4 hours. 
Step-by-step explanation:
Let's set up a proportion and cross multiply. 

Cross multiply. 
120 = 28x
Divide by 28 on both sides. 
= 4.28571428571
Round this to the nearest whole number, which is just 4. The answer is about 4 hours. 
 
        
             
        
        
        
Answer: −5
Step-by-step explanation:
simplify: (−5)
Re-order terms so constants are on the left:
(−5)f(−5)−5
 
        
             
        
        
        
Answer:
 
 
Step-by-step explanation:

 
        
                    
             
        
        
        
Step-by-step explanation:
