Some peanuts were shared equally among 12 boys & 9 girls at first. Each boy then gave 3/4 of his share of peanuts to the girls. As a result, each girl received 28 more peanuts than each boy. Find the total number of peanuts shared among the children.
Er each boy and girl has x peanuts at first. Then each girl has 1 3/4x peanuts and each boy has 1/4 peanuts. So 3/2x=28 and each kid was originally given 18 2/3 peanuts and there were 21 total kids so 392 peanuts.