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# Algebra question

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Twelve hungry teenagers can devour a very large pizza in 20 minutes. How many teenagers would it take to finish a very large pizza in 18 minutes? (Assume that all teenagers eat pizza at the same rate.)

Dec 28, 2021

#1
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5x + 3 = 7x – 1. ...
5x + 2(x + 7) = 14x – 7. ...
12t – 10 = 14t + 2. ...
5(z + 1) = 3(z + 2) + 11 Solve for Z. ...
The price of a book went up from \$20 to \$25. ...
The price of a book decreased from \$25 to \$20. ...
After taking several practice tests, Brian improved the results of his GRE test by 30%.

May be this will help.

Dec 28, 2021
#3
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The price of a book went up from \$20 to \$25. ...
The price of a book decreased from \$25 to \$20. ...

Thank you for this.

artin1023  Dec 29, 2021
#2
+22574
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If it takes 12 teenagers to eat one pizza in 20 minutes, they spent  12 x 20  =  240  teenager-minutes chewing.

So, how many teenagers will it take to eat that pizza in 18 minutes?

Divide the number of teenager-minutes by minutes to get the number of teenagers.

240 teenager-minutes  /  18 minutes  =  13 1/3 teenagers.

Dec 28, 2021