First step is Add 3 to both sides
hope it  helps
        
             
        
        
        
A) -4
d) -3.1
 for these questions you have to subtract the two numbers since they have different signs and the biggest sign is the ending sign
        
                    
             
        
        
        
<span>Cost 1 pack = x
3x + 10 = 5x
2x = 10
x = 5
1 pack cost $5
Hope this helped</span>
        
             
        
        
        
Answer:
1 1/5
Step-by-step explanation: