167k views
4 votes
Twice one number is equal to 1 more than a second number. The sum of the number is 5. Find the numbers.

User Emre Bener
by
7.9k points

1 Answer

5 votes
You can call the unknown numbers a and b
given:
(1) 2a+=+b+%2B+1
(2) a+%2B+b+=+5
-----------
I want to get a and b both on the left side
Subtract b from both sides of (1)
2a+-+b+=+1
a+%2B+b+=+5
Now all you have to do is add the equations
3a+=+6
a+=+2
Substitute this in (2)
(2) a+%2B+b+=+5
2+%2B+b+=+5
b+=+3
The numbers are 2 and 3
User YSC
by
8.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories