SOLUTION: Dorian and Dingo have a petting zoo with 12 animals, and all of them are either sheep or goats. They have twice as many sheep as goats. How many goats do they have?

Algebra ->  Exponents -> SOLUTION: Dorian and Dingo have a petting zoo with 12 animals, and all of them are either sheep or goats. They have twice as many sheep as goats. How many goats do they have?       Log On


   

Question 142563This question is from textbook a survey of mathematics with applications
: Dorian and Dingo have a petting zoo with 12 animals, and all of them are either sheep or goats. They have twice as many sheep as goats. How many goats do they have?
This question is from textbook a survey of mathematics with applications

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Dorian and Dingo have a petting zoo with 12 animals, and all of them are either sheep or goats. They have twice as many sheep as goats. How many goats do they have?
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Let # of goats be "x"; Let # of sheep by "y"
EQUATIONS:
x + y = 12
y-2x = 0
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Solve by substitution:
y = 2x
x + 2x = 12
3x = 12
x = 4 (# of goats)
y = 8 (# of sheep)
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Cheers,
Stan H.