+0  
 
0
137
4
avatar+273 

If Biftu gives me a penny, I will have twice as many pennies as he has. If I give Biftu a penny, he and I will have the same number of pennies. How many pennies do I currently have?

 Aug 18, 2020
 #1
avatar+28021 
+1

You have   7 to start with        Bitfu has 5 

 

x = yours    y = b's

 

x+1 = 2(y-1)       and

x-1 = y+1               these are given in the description

    re-arrange the second equation  x = y+2    sub this into the first equation

       y+2   +1     =  2y-2

       y + 3          = 2y-2

           y = 5                                  then   x = y+2    = 7 

 Aug 18, 2020
edited by Guest  Aug 18, 2020
 #2
avatar+273 
-1

so whats the answer

 Aug 18, 2020
 #3
avatar+28021 
0

Huh?  Are you SERIOUS?  cheeky

ElectricPavlov  Aug 18, 2020

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