School marks

Boris has a total of 22 grades. He has one-third as much ones as threes. He has two twos. How many ones and threes does he have?

Final Answer:

a =  5
c =  15

Step-by-step explanation:

b=2 a+b+c=22 a=c/3  c/3+2+c=22  4c=60  c=460=15  c=15  a=c/3=15/3=5



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