Creatures 3607

The collector of beetles and spiders had ten creatures in a box. There were a total of 72 legs in the box. How many beetles and how many spiders?

Correct answer:

x =  4
y =  6

Step-by-step explanation:


x+y=10
6x+8y = 72

x+y=10
6·x+8·y = 72

x+y = 10
6x+8y = 72

Pivot: Row 1 ↔ Row 2
6x+8y = 72
x+y = 10

Row 2 - 1/6 · Row 1 → Row 2
6x+8y = 72
-0.33y = -2


y = -2/-0.33333333 = 6
x = 72-8y/6 = 72-8 · 6/6 = 4

x = 4
y = 6

Our linear equations calculator calculates it.



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