160 * 8 = 1280 ounces. 1280/64 = 20 half gallons 20*1/2= 10 So you have 20 half gallons or 10 gallons.
In formula, you take length * 2 + width *2 = perimeter
2L + 2W = P
put in the numbers and
2 (99) +2W = 342
198 + 2W = 342
2W = 342 - 198
im sure you can do the rest. PM me for additional help, Good luck!
X equals 13/3 and Y equals 1/13 sorry if I am wrong