harold works at a resort from the beginning of march to the end of september . during the month of august this past year , he made 7 times the average ( arithmetic mean ) of his monthly totals in tips for the other months . his total tips for august were what fraction of his total tips for all of the months he worked ?
"the time from beginning of march to the end of september is 7 months . if x is the average monthly tip for all months other than august then his august month tip will be 7 * x his total tip for the 7 months = 6 * ( average tip for the months other than august ) + 7 x = 13 x august tips as a fraction of total tips = 7 x / 13 x = 7 / 13 . so e"
divide(multiply(7, const_1), add(multiply(7, const_1), multiply(7, const_1)))