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Select the correct answer.

Ed is 7 years older than Ted. Ed's age is also [tex]\frac{3}{2}[/tex] times Ted's age. How old are Ed and Ted?

A. Ted is 15 years old, and Ed is 22 years old.
B. Ted is 14 years old, and Ed is 21 years old.
C. Ted is 13 years old, and Ed is 20 years old.
D. Ted is 12 years old, and Ed is 19 years old.

Answer :

To solve this problem, we have two main pieces of information about Ed and Ted's ages:

1. Ed is 7 years older than Ted.
2. Ed's age is [tex]\(\frac{3}{2}\)[/tex] times Ted's age.

Let's use these facts to find their ages step by step.

1. Define Variables:
- Let [tex]\( T \)[/tex] represent Ted's age.
- Since Ed is 7 years older than Ted, Ed's age can be represented as [tex]\( T + 7 \)[/tex].

2. Set up the Equation:
- We know that Ed's age is also [tex]\(\frac{3}{2}\)[/tex] times Ted's age. So, we can write the equation:
[tex]\[
T + 7 = \frac{3}{2}T
\][/tex]

3. Solve the Equation:
- First, get all terms involving [tex]\( T \)[/tex] on one side:
[tex]\[
T + 7 = \frac{3}{2}T
\][/tex]
[tex]\[
7 = \frac{3}{2}T - T
\][/tex]
[tex]\[
7 = \frac{1}{2}T
\][/tex]

- Multiply both sides by 2 to solve for [tex]\( T \)[/tex]:
[tex]\[
14 = T
\][/tex]

This means Ted is 14 years old.

4. Find Ed's Age:
- Since Ed is 7 years older than Ted:
[tex]\[
\text{Ed's age} = T + 7 = 14 + 7 = 21
\][/tex]

Therefore, Ted is 14 years old and Ed is 21 years old. Based on the options given, the correct answer is:

B. Ted is 14 years old, and Ed is 21 years old.

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