Question 930618: alex is now 3 times as old as his sister mary. in 2 years alex will be 3 times mary's age then. how old was alex 4 years ago? Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! x = alex age
y = mary age
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x = 3y
x + 2 = 3(y + 2)
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put the system of linear equations into standard form
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x - 3y = 0
x + 2 = 3y + 6
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x - 3y = 0
x - 3y = 4
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answer:
This linear system is singular. It has no solution
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the reason the system has no solution is because there's an error in the problem statement:
x - 3y = 0
x - 3y = 4
it's impossible for (x - 3y) to equal 0 and 4
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please check the problem statement and re-post your question.
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