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Joe is 5 years older than sally. in 15 years joe will be 3 times as old as sally is now. how old is sally now
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Joe is 5 years older than sally. in 15 years joe will be 3 times as old as sally is now. how old is sally now
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Jan 20, 2019
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Joe is 5 years older than sally. in 15 years joe will be 3 times as old as sally is now. how old is sally now
Mathematics
high-school
Jessevl
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Lets set up an equation for this:
Let J = Joe
S = Sally
J = 5 + S
15 + J = 3S
Now solve for S (Sally) by substituting J (Joe) in the 2nd equation:
15 + (5 + S) = 3S
20 = 2S
S = 10
Therefore Sally is 10 years old.
Zvonicek
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Jan 26, 2019
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Zvonicek
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