Hello,
Please, see the attached files.
Thanks. 
 
        
             
        
        
        
Answer: Rearrange:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : 
 4*x+2*x+1-(2*x-x+21)=0 
Step by step solution :
STEP
1
:
Pulling out like terms
 1.1 Pull out like factors :
 5x - 20 = 5 • (x - 4) 
Equation at the end of step
1
:
STEP
2
:
Equations which are never true:
 2.1 Solve : 5 = 0
This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation:
 2.2 Solve : x-4 = 0 
 Add 4 to both sides of the equation : 
 x = 4 
One solution was found :
 x = 4
 
        
             
        
        
        
Answer:
a)  where
 where 
b)  where
 where 
c) 
Step-by-step explanation:
Sale price of chocolates = $1.80 per chocolate
Fixed cost for the Chocolate Shoppe per week = $450
Cost to produce one chocolate = $0.60
Cost to produce  chocolates = $0.60
 chocolates = $0.60
a) Cost function to represent the total cost for the production of  chocolates :
 chocolates :
 where
 where 
b) Revenue function to represent the revenue from the sale of  chocolates:
 chocolates:
 where
 where 
c) Profit function to represent Charlie's profit from selling  chocolates:
 chocolates:
Profit is nothing but revenue minus sales.

 
        
             
        
        
        
Let's solve for y.<span>6=<span><span>4x</span>+<span>9y</span></span></span>Step 1: Flip the equation.<span><span><span>4x</span>+<span>9y</span></span>=6</span>Step 2: Add -4x to both sides.<span><span><span><span>4x</span>+<span>9y</span></span>+<span>−<span>4x</span></span></span>=<span>6+<span>−<span>4x</span></span></span></span><span><span>9y</span>=<span><span>−<span>4x</span></span>+6</span></span>Step 3: Divide both sides by 9.<span><span><span>9y</span>9</span>=<span><span><span>−<span>4x</span></span>+6</span>9</span></span><span>y=<span><span><span><span>−4</span>9</span>x</span>+<span>2<span>3</span></span></span></span>
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
mean
I think.