Question 710911
 Three years ago Jane was three times as old as Billy. Now she is only twice as old as him. How old is Billy now?
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Equations:
j-3 = 3(b-3)
j = 2b
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Substitute for "j" and solve for "b":
2b-3 = 3b-9
b = 6 (Billy's age now)
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Solve for "j":
j = 2b = 12 (Jane's age now)
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Cheers,
Stan H.
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