1. Distribute
5(2n-4)
10n-20
9(n+2)
9n+18
10n-20=9n+18
2. Combine like terms
combine the terms with “n”, and then combine the other numbers.
Hope this helps!
        
             
        
        
        
Alright so turn 3/4 into a decimal. 
3/4 =.75 
We need to set up an equation. To do that are need to give boys and girls their own variables. 
Girls= X 
And since there is 3/4 as many boys
Boys=. 75X
Now we know the sum of boys and girls equals 35 
X+.75X=35 
X+.75X=1.75X 
Now we have 1.75X=35 
Divide by 1.75 and get 
20=X 
Now plug 20 into the equations got from before. 
Boys =. 75*X = 20 *. 75 = 15
Girls = X =20 
Your Answer: 
15 boys 
20 girls 
You can check 
20+15=35
15/20=3/4
        
                    
             
        
        
        
<span>12x +3y = 12
y = -4x +5
 
We can convert the first equation to the same form as the second (y=mx+b, or slope-intercept).
 
12x +3y = 12
3y = -12x +12
y = -4x +4
 
Comparing the simplified first equation y = -4x +4 to the second equation y = -4x + 5, we see that both have the same slope (m = -4), but different y-intercepts (b = 4, b = 5). This means they are parallel lines, or an inconsistent system. There are no solutions.</span>
        
             
        
        
        
Given the following equation representing the cost of producing DVD Players:

Let's determine the number of DVD players produced if the cost is $544.50






Therefore, it'll cost $544.50 to produce 11 DVD Players.
The answer is 11.