+0  
 
0
363
2
avatar

how would this work:

Jenny Kenny and Penny together have 50 marbles. Kenny has double as many as Jenny has, and Penny has 12.

How many does Jenny have.

therefore the equation is

3x+12=50

-12           -12

3x=38

/3     /3

x=12.66

but you can't have 0.66 of a marble

 Dec 7, 2017
 #1
avatar+98196 
+2

I end up with the same result!!!...however...if we make a slight change such that Kenny has twice as many as Penny...it becomes do-able

 

J + K + P  =  50

K  = 2P  = 2(12) =   24

 

 

 

So...doing some substitution

 

J + 24 + 12  = 50

J  +  36  = 50

J  =  14

 

 

cool cool cool

 Dec 7, 2017
edited by CPhill  Dec 7, 2017
 #2
avatar
+1

thank you

Guest Dec 7, 2017

31 Online Users

avatar