the ratio of pens to pencils is 5 to 6 . there are 4 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 = 4 x = 4 the number of pencils is 24 . the answer is d ."
add(multiply(4, 5), 4)