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Paulo's economics course requires two papers-one long and one short-throughout the semester. The number of pages, 
l, in the long paper is 1 more than 2 times the number of pages, 
s, in the short paper. If the total number of pages for both papers is 40 , how many pages must be in the long paper?

Paulo's economics course requires two papers-one long and one short-throughout the semester. The number of pages, l l , in the long paper is 11 more than 22 times the number of pages, s s , in the short paper. If the total number of pages for both papers is 4040 , how many pages must be in the long paper?

Full solution

Q. Paulo's economics course requires two papers-one long and one short-throughout the semester. The number of pages, l l , in the long paper is 11 more than 22 times the number of pages, s s , in the short paper. If the total number of pages for both papers is 4040 , how many pages must be in the long paper?
  1. Set up equation: Set up the equation based on the given information.\newlineWe know that the long paper has 11 more page than twice the number of pages in the short paper. This can be written as:\newlinel=2s+1l = 2s + 1\newlineWe also know that the total number of pages for both papers is 4040, which gives us another equation:\newlinel+s=40l + s = 40
  2. Substitute and simplify: Substitute the expression for ll from the first equation into the second equation.\newlineUsing l=2s+1l = 2s + 1, we substitute ll in the second equation to get:\newline(2s+1)+s=40(2s + 1) + s = 40
  3. Solve for s: Simplify the equation and solve for s.\newlineCombining like terms, we get:\newline3s+1=403s + 1 = 40\newlineNow, subtract 11 from both sides to isolate the terms with s:\newline3s=4013s = 40 - 1\newline3s=393s = 39\newlineNext, divide both sides by 33 to solve for s:\newlines=393s = \frac{39}{3}\newlines=13s = 13
  4. Find number of pages: Determine the number of pages in the long paper using the value of ss. \newlineNow that we know s=13s = 13, we can use the first equation to find ll: \newlinel=2s+1l = 2s + 1 \newlinel=2(13)+1l = 2(13) + 1 \newlinel=26+1l = 26 + 1 \newlinel=27l = 27

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