Helping students gain understanding and self-confidence in algebra.
tibi318 wrote:Mary has 11N marbles and cathy has 7N marbles so we have a ratio of 11:7. after the gift, Mary will have 11N - 3 marbles. after receiving 3 marbles , cathy will have 7N + 3 marbles. the new ration in terms of N, after the gift is: (11N -3)/(7N + 3) and the numerical value of this ratio is 16/11. How do we get 16/11 from (11N -3)/ (7N +3)
tibi318 wrote:Mary and Cathy have marbles in the ratio 11:7. If Mary gifts away 3 of her marbles to Cathy, then the new ratio of marbles will be 16:11. How many more marbles does Mary have than Cathy does after the gift?