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I am thinking of a number. I multiply it by 13 and add 19. I get the dame answer if it multiply it by 3 and add 239.

Guest May 12, 2017
 #1
avatar+89876 
+2

Let N be the number.....so.....

 

13N + 19  =  3N + 239        subtract 19 , 3N from both sides

 

10N   =  220          divide both sides by 10

 

N  = 22

 

 

cool cool cool

CPhill  May 12, 2017

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