Posted by chrissy on Wednesday, October 10, 2007 at 9:34pm.
bill is 2 years older than ted. in 5 years, 5 times ted's age will be 4 times bill's age. how old is ted?
B = T + 2
4(B + 2) = 5(T + 2)
Can you take it from here.
let x=Bill's age, y=Ted's age
Bill is two years older than Ted. This gives the first equation:
y=x-2
In 5 years, their ages will be:
Bill=(x+5), Ted=(y+5)
and...
4*Bill's age=5*Ted's age
4*(x+5)=5*(y+5)
Use the first equation to substitute for y in the second equation. Then, you will only have x's. Solve for x. Plug the solved value for x into the first equation to easily find y.
Bill is 2 years older than ted
(1) b = t + 2
where b = bill's age TODAY and t = ted's age TODAY
In 5 years 5 times ted's age will be 4 times bill's age:
(2) 5(t+5) = 4(b+5)
Put equation (1) into (2) for b.
5(t+5) = 4(t+2+5) ==> 5t+25 = 4t+28
solve for t to get t = 3
So ted is 3 and bill is 5 years old.
Bill is 2 years older than ted
(1) b = t + 2
where b = bill's age TODAY and t = ted's age TODAY
In 5 years 5 times ted's age will be 4 times bill's age:
(2) 5(t+5) = 4(b+5)
Put equation (1) into (2) for b.
5(t+5) = 4(t+2+5) ==> 5t+25 = 4t+28
solve for t to get t = 3
So ted is 3 and bill is 5 years old.
Related Questions
math - bill and ted combined age is 40. Eight years ago, bill was 2 years ...
algebra - Jill is 2 years older than Mike. in 5 years, 5 times Mike's age ...
math - Harper is two times older than her brother Bill. Let (b) represent Bill&#...
Math - Could someone please help me solve this problem, the age numbers that I ...
algerbra - mrs. johnson is 3 times as old as her son. ten years agoe she was 5 ...
math - use the names and ages of yourself and the other two people you selected...
Mathematics-please help quick!! - Harry is twice as old as Doyle. Doyle's ...
maths - A man's age is 4 times the combined age of a two sons. One of whom ...
algebra - A person is 3 times as old as aonther person but in 15 years she will ...
math - you are 6 years older than your sister she is 4 years older than your ...
For Further Reading
