After Sally had given 1/9 of her stamps to Andy, she had 280 stamps (since they now have equal shares). So 280 was 8/9 of what she started with, making the 1/9 she handed over equal to 280/8, that’s 35. And Andy was “under” by the same amount she was “over” an equal share, that’s 35 under matching her 35 over, which is 70 altogether.
By all means use algebra but you may find you can reason a word problem through in words.
Explanation:Since Andy collected 432 stamps which is 4 times the number stamps Alva collected you would have to divide 432 by 4 to get 108.Now since Alva collected 6 times as many stamps as Lucy you would just divide 108 by 6 to then get 18 which is the number of stamps Lucy collected.
