the ratio of pens to pencils is 5 to 6 . there are 9 more pencils than pens . how many pencils are there ?
let the number of pens be 5 x and the number of pencils be 6 x . 6 x - 5 x = 9 x = 9 the number of pencils is 54 . the answer is d .
add(multiply(9, 5), 9)