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It’s moving day and Lydia has packed her books into a large and small boxes. The large boxes hold 35 book and the small ones hold 20 books. She packed her 420 books into 18 boxes. How many are large and how many are small

Answer :

Answer:

4 large , 14 small

Step-by-step explanation:

35*x +20*(18-x)=420

35x +360-20x=420

35x-20x=420-360=60

15x= 60

x =4

4 large  14 small

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