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There are some cookies in the jar. On Monday, Alex ate 1/4 of the cookies. He later bought 24 cookies and added into the jar. On Tuesday, Alex ate 36 cookies. He was hungry and ate another 30 cookies. There were no cookies left. How many cookies were there in the jar at first?

 Feb 28, 2022
 #1
avatar+36435 
+1

x = original amount

 

eats 1/4    leaves   3/4 x

 

3/4 x  + 24   - 36  - 30  = 0    solve for  'x' the original amount

 Feb 28, 2022
 #2
avatar+231 
+1

Let x be the total cookies at first.

3/4x + 24 - 36 - 30 = 0

3/4x = 42

     x = 56

Alex had 56 cookies in the jar at first

 Mar 2, 2022

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