SOLUTION: There are (21x^2 -14x) days until the end of the year. How many weeks are there until the end of the year? Thinking I divide by 7 but not sure if it is 7 or 7x or if I'm totall

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: There are (21x^2 -14x) days until the end of the year. How many weeks are there until the end of the year? Thinking I divide by 7 but not sure if it is 7 or 7x or if I'm totall      Log On


   

Question 420017: There are (21x^2 -14x) days until the end of the year. How many weeks are there until the end of the year?
Thinking I divide by 7 but not sure if it is 7 or 7x or if I'm totally wrong on this.
Thanks
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Since 7 days = 1 week, you can multiply both sides by 21x%5E2-14x to get


7%2821x%5E2-14x%29 days = 1%2821x%5E2-14x%29 weeks


Now isolate 21x%5E2-14x by dividing both sides by 7 to get


21x%5E2-14x days = 1%2821x%5E2-14x%29%2F7 weeks


21x%5E2-14x days = 3x%5E2-2x weeks


So 21x%5E2-14x days = 3x%5E2-2x weeks



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