Thursday

August 21, 2014

August 21, 2014

Posted by **Ricky** on Wednesday, January 23, 2008 at 12:32am.

find the numbers

- math -
**Quidditch**, Wednesday, January 23, 2008 at 12:51amx=first number

y=second number

3*x + y = 18

2*x - y = 12

You need to eliminate one of the variables and solve for the remaining one. In this problem, you can see that if the two equations are added together, the y variable is eliminated:

adding:

3x + y = 18

2x - y = 12

---------------

5x + 0y = 30

5x = 30

x=6

plug the known x value into either equation to solve for y.

taking the first one...

3*6 + y = 18

rearrange to get

y = 0

- math -
**Ricky**, Wednesday, January 23, 2008 at 12:58amhey thx man, i messed up that one cause i though added to another number ment it goes before it

**Related Questions**

Math - twice a number minus a second number is -1. twice the second number added...

Algebra =/ - One Number Added To Three Times Another Number Is 24. Five Times ...

Math - The sum of three numbers is 301. The second number is 3 less than twelve ...

Math - The sum of three times a first number and twice a scond number is 43. If ...

10th grade math - The sum of three numbers is 301. The second number is 3 less ...

6th grade math - Can you check these problems, please? Translate each phrase ...

math help - Five added to three times a number is 29. can someone help me ...

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 ...

Grade 8 Math - Can you write them in Mathematical/numbers form I'll solve them ...