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MatroZZZ [7]
3 years ago
8

20 is equal to 5 less than twice a number.

Mathematics
1 answer:
sweet [91]3 years ago
5 0
If we have a number represented by n, we have 20 is equal to, so 20=something. That something is "5 less than twice a number". 5 less than something means something-5, and something-5=20. Since 5 is less than twice a number, and twice a number is n+n=2n, we have 2n-5=20
Actually solving the problem, we can start by adding 5 to both sides, resulting in 2n=25. Next, we can divide both sides by 2 to get n=12.5
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An electrician earns $110 after his first hour of working for a client. His total pay based on the number of hours worked can be
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I don't like trying all of them so I will make up my own which will probably be in the answers 
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