First you will have too find the least common multiple which is 20 and what you multiplied to get 20 multiply it which will make 3/5 to 12/20 and 1/4 too 4/20 and then subtract the two which is 8/20 or 8 oranges. if you need more information talk too me
You would have 10 muffins left because 1/3 of 15 is 5 so 15-5=10
6w=30; divide 30 by 6 to the w by itself; the answer is 5
9c + 5ab/ 11c is the simplified answer