Answer:
4x + 2
Step-by-step explanation:
x - 1 is adding an x and subtracting a 1 ,so
x + x + x + (x - 1) + 1 + 1 + 1
= x + x + x + x - 1 + 1 + 1 + 1 ← collect like terms
= 4x + 2
 
        
             
        
        
        
There was already a question like this on here so i’m going off the answer already given: 30 hours, i hope it’s right
        
                    
             
        
        
        
Answer:
Getting through ratio method
100-20=80 percent have to pay
18:80
<em>x</em>:100
cross multiply
80 x <em>x=1</em>8 x 100
80x=1800
x=1800/80
x=22.5
So the original price was $22.50
Step-by-step explanation:
 
        
             
        
        
        
*Given
Money of Phoebe            - 3 times as much as Andy
Money of Andy                - 2 times as much as Polly
Total money of Phoebe,  - £270
    Andy and Polly
*Solution
Let
B - Phoebe's money
A - Andy's money
L - Polly's money
1. The money of the Phoebe, Andy, and Polly, when added together would total £270. Thus, 
                  B + A + L  = £270                     (EQUATION 1)
2. Phoebe has three times as much money as Andy and this is expressed as
  
                  B = 3A
3. Andy has twice as much money as Polly and this is expressed as
                  A = 2L                           (EQUATION 2)
4. This means that Phoebe has ____ as much money as Polly, 
                 B = 3A
                 B = 3 x (2L)
                 B = 6L                            (EQUATION 3)
This step allows us to eliminate the variables B and A in EQUATION 1 by expressing the equation in terms of Polly's money only. 
5. Substituting B with 6L, and A with 2L, EQUATION 1 becomes, 
                  6L + 2L + L = £270
                                9L = £270
                                  L = £30
So, Polly has £30. 
6. Substituting L into EQUATIONS 2 and 3 would give us the values for Andy's money and Phoebe's money, respectively. 
                  A = 2L                           
                  A = 2(£30)
                  A = £60
Andy has £60
                  B = 6L                         
                  B = 6(£30)
                  B = £180
Phoebe has £180
Therefore, Polly's money is £30, Andy's is £60, and Phoebe's is £180.