Book

John read the book so that it read 28 pages per day. Maxim read 32 pages a day and read it two days earlier than John. How many pages has the book?

Correct answer:

n =  448

Step-by-step explanation:

n=28 2 32/(3228)=448

n = 28 d; n = 32 ( d-2)

n = 28·d
n = 32·( d-2)

28d-n = 0
32d-n = 64

Pivot: Row 1 ↔ Row 2
32d-n = 64
28d-n = 0

Row 2 - 28/32 · Row 1 → Row 2
32d-n = 64
-0.13n = -56


n = -56/-0.125 = 448
d = 64+n/32 = 64+448/32 = 16

d = 16
n = 448

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