Or read the book 2 days on 4 pages and 7 days on 5 pages a day how many pages he during all the time read the solution of a task

391
4*2+5*7=43 Since he read to Answer D 2 days on 4 pages, it is necessary 2*4, he read EVERY DAY the Same about 5*7 It it is necessary not just to remember, you have to understand it
319
Answer add