# Alvin is 11 years older than Elga. The sum of their ages is 71 . What is Elga's age?

math!

### 16 Answers

- Engr. RonaldLv 71 year ago
ley x - Alvis age

let y Elgas age

x = y + 11 eq1

x + y = 71 eq2

plug in eq1 to eq2

y + 11 + y = 71

2y + 11 = 71

2y = 71 - 11

2y = 60

y =30 <----------Elgas age

Therefore, Elga's age is 30...Answer//

- Login to reply the answers

- lenpol7Lv 71 year ago
A + E = 71

A = E + 11

Hence

E = A - 11

Substitute

A + (A - 11) = 71

2A = 82

A = 42

E = 31

- Login to reply the answers

- 1 year ago
Let A and E be Alvin's and Elga's ages respectively.

A= E + 11

A + E = 71

A-E=11

2A=82

A=41

41+E=71

E=30

Elga is 30.

- Login to reply the answers

- SkyLv 71 year ago
I figured it out in my head in less than 10 seconds. If I can do it, you can do it.

- Login to reply the answers

- How do you think about the answers? You can sign in to vote the answer.
- PuzzlingLv 71 year ago
If you took away the 11 year difference they would be the same age and the sum would be 60. Hence Elga is half that or 30.

Answer:

Elga is 30 (and Alvin is 41)

- Login to reply the answers

- Φ² = Φ+1Lv 71 year ago
A + E = 71 and A - E = 11 so E = (71 - 11)/2 = 30

Elga is 30 years old.

- Φ² = Φ+1Lv 71 year agoReport
Thank you for asking this question. Now that over a month has passed, can you please award the Best Answer to whichever answer you find most deserving?

- Login to reply the answers

- KrishnamurthyLv 71 year ago
Alvin is 11 years older than Elga.

The sum of their ages is 71.

A + E = 71

A - E = 11

A = 41, E = 30

Elga is 30 years old.

You idiot - you'e showing off and at the same time you're helping someone cheat on their homework. What's wrong with you?

- Login to reply the answers