3x + 7 = x
First, subtract 3x from both sides. / Your problem should look like: 7 = x - 3x
Second, simplify x - 3x to -2x. / Your problem should look like: 7 = -2x
Third, divide both sides by -2. / Your problem should look like: 

 = x
Fourth, simplify 

 to 

 / Your problem should look like: 

 = x
Fifth, switch sides. / Your problem should look like: x = 

Answer as fraction: 

Answer as decimal: -3.5
 
        
        
        
Answer:
x = 5
Step-by-step explanation:
20(20-x)=300
1. Divide both sides by 20.
20(20-x)/20 = 300/20
2. Simplify.
20-x=15
3. Subtract 20 from both sides.
20-x-29=15-20
4. Simplify.
-x=-5
5. Divide both sides by -1.
-x/-1 = -5/-1
6. Simplify.
x=5
 
        
             
        
        
        
Answer:
4
hours
i hope that helped
Step-by-step explanation:
 
        
                    
             
        
        
        
16/8= 2
2 is a whole number
        
                    
             
        
        
        
Answer:6
Step-by-step explanation:
$220 × 6 = $1320 this is how much it cost to pay 6 carpenters for one day. Now lets find how much it cost to 12 plumbers at $260 a day. $260 × 12 = $3120 this is how much it costs to pay 12 plumbers a day.