Giraffe 2

The lifespan of a guinea pig is six years less than that of a giraffe. The lifespan of a tiger is four times that of a guinea pig. If the total lifespan of the three animals is 30 years, calculate the lifespan of the giraffe.

Final Answer:

g =  10

Step-by-step explanation:


p=g-6
t=4p
t+p+g=30

p=g-6
t=4·p
t+p+g=30

g-p = 6
4p-t = 0
g+p+t = 30

Row 3 - Row 1 → Row 3
g-p = 6
4p-t = 0
2p+t = 24

Row 3 - 2/4 · Row 2 → Row 3
g-p = 6
4p-t = 0
1.5t = 24


t = 24/1.5 = 16
p = 0+t/4 = 0+16/4 = 4
g = 6+p = 6+4 = 10

g = 10
p = 4
t = 16

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You need to know the following knowledge to solve this word math problem:

algebraUnits of physical quantitiesGrade of the word problem

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