melaniemartillo123 melaniemartillo123

28-04-2020
Mathematics

contestada

On Tuesday Shayna bought 7 boxes. On Wednesday half of all the boxes were destroyed. On Thursday there were only 21 left. How many did she have on Monday?

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chisomfabian16 chisomfabian16

28-04-2020

Answer:

35

Step-by-step explanation:

Monday=x

Tuesday=7

Wednesday=1/2

Thursday=21

Therefore,

x+7/2=21

=x+7=2*21

=x+7=44

=x=44-7

=x=35

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