Posted by **Jane** on Sunday, December 1, 2013 at 10:29pm.

twice a number minus a second number is -1. twice the second number added to three times the first number is 9. find the two numbers.

- Math -
**Reiny**, Sunday, December 1, 2013 at 11:28pm
first number --- x

2nd number --- y

2x - y = -1

or

y = 2x+1

2y + 3x = 9

2(2x+1) + 3x = 9

4x + 2 + 3x = 9

7x = 7

x = 1

then y = 3

The first number is 1, and the second number is 3

check:

twice the first - second

= 2 - 3 = -1 , check!

twice the second added to three times the first

2(3) + 3(1)

= 9 , check!

## Answer This Question

## Related Questions

- math - the sum of two number is 39 . twice the first number plus 3 times the ...
- Please help quick! Math - The sum of three times a first number n twice second ...
- MS. SUE - MATH HELP PLEASE - The sum of five times a number and twice a second ...
- math - yea it sais, three times one number added to another number is 18. twice ...
- algebra - Twice the first number is eleven more than the sum of the other two ...
- Math - The sum of three times a first number and twice a scond number is 43. If ...
- algebra - Three numbers are such that the first number is 10 less than twice the...
- algebra - Five times the smallest of three consecutive odd integers is ten more ...
- math - The greater of two numbers is 1 more than twice the smaller. Three times ...
- Math - 1)one number is four more than a second number. Twice the second is three...

More Related Questions