Dromedaries

The zoo has ten camels, including bipedal camels (drabers) and single-humped camels (dromedaries). They have a total of 14 humps. Determine the number of auctioneers in the ZOO.

Correct answer:

d =  4

Step-by-step explanation:


d+j=10
2d+1j=14

d+j=10
2·d+1·j=14

d+j = 10
2d+j = 14

Pivot: Row 1 ↔ Row 2
2d+j = 14
d+j = 10

Row 2 - 1/2 · Row 1 → Row 2
2d+j = 14
0.5j = 3


j = 3/0.5 = 6
d = 14-j/2 = 14-6/2 = 4

d = 4
j = 6

Our linear equations calculator calculates it.



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