Kellys buys shoes with all of her money. she only has $150 . one pair of shoes is for her and they cost $40. the other 2 pair of shoes are for her sister. each pair of shoes cost the same price. determine the price of one pair of shoes

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.