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Julian collected 5 times as many stickers as Robert. When Julian gave Robert some of his stickers, they each had 9. How many stickers had Julian given to Robert?

 Apr 13, 2021
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j = 5r

j- s  = r + s

 

5r-s = 9      s = 'some stickers'

r+s = 9       add these two equations

6r = 18

r = 3               then           j = 5r = 15      

r + s = 9

3 + s = 9

s = 6

 Apr 13, 2021

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