Students

The class has 22 students. 2 of which has assesement of 2. Count of assesement of 1 is three times more than count of students with assesement of 3. How many students has assesement of 1 and how many students has assesement of 1.

Correct result:

x =  15
y =  5

Solution:


x+y=22-2
x = 3y

x+y=22-2
x = 3•y

x+y = 20
x-3y = 0

x = 15
y = 5

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