# Trouble with a number prob.

• Oct 18th 2006, 10:38 PM
Nate
Trouble with a number prob.
Two numbers add up to 43. Four times the first is four more than twice the second. What are the numbers? Im stuck on this one, lol. Any help would be awesome, thanks.
• Oct 18th 2006, 10:50 PM
Glaysher
Quote:

Originally Posted by Nate
Two numbers add up to 43. Four times the first is four more than twice the second. What are the numbers? Im stuck on this one, lol. Any help would be awesome, thanks.

Call one number x
Then the other is 43 - x as they add up to 43

Four times the first is 4x

Twice the second is 2(43 - x) = 86 - 2x
Then 4 more is 86 - 2x + 4 = 90 - 2x

So 4x = 90 - 2x

6x = 90

x = 15
43 - x = 28
• Oct 18th 2006, 11:18 PM
Nate
Thanks that helped alot
Thats so easy now. Thanks so much for the help; grately appreciated.
• Oct 19th 2006, 04:26 AM
ThePerfectHacker
Quote:

Originally Posted by Nate
Two numbers add up to 43. Four times the first is four more than twice the second. What are the numbers? Im stuck on this one, lol. Any help would be awesome, thanks.

x+y=43
4x=2y+4

In first equation subtract 'y' from both sides:
x=43-y

In second equation substitute 'x' from first equation:
4(43-y)=2y+4

Simplify by dividing by 2,
2(43-y)=y+2

Open parantheses,
86-2y=y+2