SOLUTION: teresa is 3x older than her sister ann. if ann is 8 years old now find teresa's age when ann is 15 years old by completing and simplifying the expression 15 - ____ + (3 x ___).plea

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Question 979455: teresa is 3x older than her sister ann. if ann is 8 years old now find teresa's age when ann is 15 years old by completing and simplifying the expression 15 - ____ + (3 x ___).please help with a little explanation.thanks in advance.
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
t, Teresa
a, Ann

system%28a=8%2Ct=3a%29

t=3%2A8=24, Teresa's age now.

x, how many years until Ann is 8%2Bx=15.
x=7

Teresa will be 24%2B7.


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Their ages NOW should first be found, and then the ages in the future can then be examined and that future time quantity found.