Remaining 83116

Ondra was reading a book. On the first day, he read one-tenth. On the second day, he read half of the remainder; on the third day, he read 20% of the new remainder; and on the fourth day, he read the remaining 72 pages. Thus, the book had 72 pages.

Correct answer:

n =  200

Step-by-step explanation:

d=72  c0.20 c=d c0.20 c=72  0.8c=72  c=0.872=90  c=90  bb/2=c bb/2=90  b=180  b=1180=180  b=180  aa/10=b aa/10=180  9a=1800  a=91800=200  a=200  n=a=200   Verifying Solution:   B=aa/10=200200/10=180 C=BB/2=180180/2=90 D=C0.20 C=900.20 90=72 E=DD=7272=0



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Our percentage calculator will help you quickly and easily solve a variety of common percentage-related problems.
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: