8.47/7=1.21 per lb. 11.07/9=1.23 so $8.47 for 7lbs. is cheaper than 11.07 for 9lbs.
If he gave away 2/3 of 48, that means he gave away 32, leaving him with 16
If he gave away 3/4 of 16, he gave away 12, leaving him with 4
Answer: 4
N=5
Since 6n and 3n have the same variables you need to subtract them. So 6n-3n=3n. Now you have 3n=15. To get n by it’s self you need to divide 3 by 15. 3 divided by 15 is 5. This means that n=5. Hope this helps!!