You can find a unit rate when given a rate by dividing the the second number in the rate (if you had 3:4, you would divide 4) by the same number. (in the problem I gave you, you would divide 4 by 4 to get 1 then divide 3 by 4.) Then you would have the unit rate. Sorry if that didn't make any sense.
Answer:
assuming the three options are no solutions, one solution and all real numbers, i would say the final option. i forgot what the proper wording is thoough
55d+10
55/11=5.
10/5=2
5(11)+2
Yes I worked it in my brain hahahahahah