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Chris had 3/5 as many rocks as Melody. Melody gave 7 rocks to Chirs so that they would each have the same amount. How many rocks did the two have altogether?

 May 18, 2021
 #1
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Let Melody's rocks  =  M

Let  Chris's rocks =  (3/5)M

 

So

 

M - 7  = (3/5)M  +  7           simplify

 

M - (3/5)M  =  7 + 7

 

(2/5)M  =  14               multiply  both sides by  5/2

 

M  =  14 (5/2)  =  35

 

(3/5)M =  (3/5) (35)  =  21

 

35  +  21   =    56  all  together

 

 

cool cool cool

 May 18, 2021

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