Answer:
A)
Step-by-step explanation:
 
        
             
        
        
        
The answer is:  [C]:  " 3 " .
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Explanation:
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         4x - 1 = 2x + 5 ;  Solve for "x" ; 
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 Subtract "2x" from each side of the equation; and add "1" to each side of the equation:
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       4x - 1 - 2x + 1 = 2x + 5 - 2x + 1 ;
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          2x = 6 ;
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Divide EACH side of the equation by "2" ; to isolate "x" on ONE side of the equation;  and to solve for "x" ;
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          2x / 2  =  6 / 2 ;
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               x  =  3 .
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The answer is:  [C]:  " 3 " .
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I do not know the full question being asked, but if he reads 3/4 chapters in 4/5 hours, he would read 6/4 chapters, or 1 1/2 chapters in 1 3/5 hours.
Please mark Brainliest if helpful! 
If this isn’t your question, please provide it fully in the comments of this answer. :))
        
             
        
        
        
x+y = 47
x-y = 21
------------  add together
2x =68  divide by 2
x=34
x+y = 47
34+ y = 47
subtract 34 from each side
y = 13
the two numbers are 34 and 13
 
        
             
        
        
        
Answer:
The principal is $4,150.
Step-by-step explanation:
We have to find the principal if the maturity value is $4,500 and the simple interest is $350.
<u>As we know that the formula for calculating the final amount or maturity amount is given by;</u>
Amount = Principal + Interest 
Here, Simple interest = $350 
Amount or Maturity value = $4,500 
So, the Principal = Amount - Interest 
Principal = $4,500 - $350 
                = $4,150
Hence, the principal if the maturity value is $4,500 and the simple interest is $350 is $4150.