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Do this make sense??

Do this make sense??
asked 16.7k views
17 votes
Do this make sense??

Do this make sense??-example-1
asked
User MattWeiler
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8.7k points

1 Answer

4 votes
the mistake is that they subtracted 21 instead of adding it. you would have had to added 21 to the left side to cancel it out and added 21 to the right side to get p= 55
answered
User Drubio
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8.3k points
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