School marks

Boris has a total of 22 marks. Ones have 3 times less than threes. There are two twos. How many has ones and threes?

Correct result:

a =  5
c =  15

Solution:


a+b+c=22
b = 2
a=c/3

a+b+c = 22
b = 2
3a-c = 0

a = 5
b = 2
c = 15

Our linear equations calculator calculates it.



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