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Each can of tennis balls has  x balls. Initially, Sam has 14 cans of tennis balls, plus 3 extra balls. Jerri initially has 7 cans of tennis balls, plus 8 extra balls. If Jerri doubles the number of tennis balls she has, how many more balls will she have than Sam has?

 May 18, 2019

Best Answer 

 #1
avatar+8720 
+3

number of tennis balls Sam has  =  14x + 3

 

number of tennis balls Jerri has  =  7x + 8

double the number of tennis balls Jerri has  =  2 * (7x + 8)

double the number of tennis balls Jerri has  =  14x + 16

 

14x + 16   is how many more than   14x + 3   ?

 

(14x + 16) - (14x + 3)  =  14x + 16 - 14x - 3  =  16 - 3  =  13

 

If Jerri doubles the number of tennis balls she has, she will have  13  more balls than Sam has.

 May 18, 2019
 #1
avatar+8720 
+3
Best Answer

number of tennis balls Sam has  =  14x + 3

 

number of tennis balls Jerri has  =  7x + 8

double the number of tennis balls Jerri has  =  2 * (7x + 8)

double the number of tennis balls Jerri has  =  14x + 16

 

14x + 16   is how many more than   14x + 3   ?

 

(14x + 16) - (14x + 3)  =  14x + 16 - 14x - 3  =  16 - 3  =  13

 

If Jerri doubles the number of tennis balls she has, she will have  13  more balls than Sam has.

hectictar May 18, 2019

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