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Eddie is 7 years older than Brian. If Brian is x years old, then how old was Eddie 11 years ago?
- a)x - 18
- b)x - 4
- c)x - 7
- d)7x - 11
- e)x + 18
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Eddie is 7 years older than Brian. If Brian is x years old, then how o...
We can model this by getting Eddie’s age now and then figuring out how old he was 11 years ago. Right now, he is x+7 . Eleven years ago, Eddie was x + 7 -11 = x - 4 years old. This is answer B.
a. The correct calculation should be x+ 7 (to get Eddie’s age now) - 11 , which is x - 4 .
b. Correct
c. This is an incorrect calculation of Eddie’s present age.
d. This response does not relate their ages properly.
e. This also does not express their age relationship properly.
a. The correct calculation should be x+ 7 (to get Eddie’s age now) - 11 , which is x - 4 .
b. Correct
c. This is an incorrect calculation of Eddie’s present age.
d. This response does not relate their ages properly.
e. This also does not express their age relationship properly.
Most Upvoted Answer
Eddie is 7 years older than Brian. If Brian is x years old, then how o...
To solve this problem, we need to first assign variables to the ages of Eddie and Brian. Let's say Brian is x years old. According to the problem, Eddie is 7 years older than Brian. So, Eddie's age can be represented as x + 7.
Now, we need to determine Eddie's age 11 years ago. To do this, we subtract 11 from Eddie's current age. So, Eddie's age 11 years ago is (x + 7) - 11, which simplifies to x - 4.
Therefore, the correct answer is option B) x - 4, which represents Eddie's age 11 years ago when Brian is x years old.
Let's summarize the solution:
- Assign variables:
- Brian's age: x
- Eddie's age: x + 7
- Determine Eddie's age 11 years ago:
- Eddie's age 11 years ago = (x + 7) - 11
- Simplifying, Eddie's age 11 years ago = x - 4
So, Eddie's age 11 years ago is x - 4, which is the correct answer.
Now, we need to determine Eddie's age 11 years ago. To do this, we subtract 11 from Eddie's current age. So, Eddie's age 11 years ago is (x + 7) - 11, which simplifies to x - 4.
Therefore, the correct answer is option B) x - 4, which represents Eddie's age 11 years ago when Brian is x years old.
Let's summarize the solution:
- Assign variables:
- Brian's age: x
- Eddie's age: x + 7
- Determine Eddie's age 11 years ago:
- Eddie's age 11 years ago = (x + 7) - 11
- Simplifying, Eddie's age 11 years ago = x - 4
So, Eddie's age 11 years ago is x - 4, which is the correct answer.
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