Age question

Jano is three times older than Zdeno. Zdeno is 12 years younger than Janko. How old is Jano, and how old is Zdeno?

Correct answer:

j =  18
z =  6

Step-by-step explanation:


j=3z
z = j-12

j=3·z
z = j-12

j-3z = 0
j-z = 12

Row 2 - Row 1 → Row 2
j-3z = 0
2z = 12


z = 12/2 = 6
j = 0+3z = 0+3 · 6 = 18

j = 18
z = 6

Our linear equations calculator calculates it.



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