SOLUTION: I am having trouble setting up the system for the following problem: The sum of Tom's age and Vanessa's age is 72. In 9 years the sum of their ages will be twice Tom's presen

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Question 451997: I am having trouble setting up the system for the following problem:
The sum of Tom's age and Vanessa's age is 72. In 9 years the sum of their ages will be twice Tom's present age.
I know the first equation for the first sentence is: t + j = 72. What about the second sentence?
Thank you!
~Gina
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of Tom's age and Vanessa's age is 72.
In 9 years the sum of their ages will be twice Tom's present age.
I know the first equation for the first sentence is: t + j = 72. What about the second sentence?
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t + j = 72
(t+9)+(j+9) = 2t
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Substitute for "t" and solve for "j":
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Cheers,
Stan H.