We have 10 people standing in a row. At first, the total number of marbles the females have were equal to the total number of marbles the males have. Then each person gave a marble to every person standing to the right of him/her. After that, the total number of marbles females have increased by 25. How many girls are there in the row?
May I have some help how to start approach this kind of algebra work?
I tried let x = number of marbles each man has
let y = number of marbles each woman has
a = number of men
b = number of women
so ax + by = something I don't know
but a + b = 10
how to form an expression for the last sentence ? something something = by + 25
May I have some help how to start approach this kind of algebra work?
I tried let x = number of marbles each man has
let y = number of marbles each woman has
a = number of men
b = number of women
so ax + by = something I don't know
but a + b = 10
how to form an expression for the last sentence ? something something = by + 25