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November 21, 2014

November 21, 2014

Posted by **Veronica** on Wednesday, February 25, 2009 at 9:19pm.

7x + 4y = 17

Answer: (3,1)

2) -3x + 5y = -7

9x + 2y = 38

Answer: (4,1)

3) 7r + 3s = 13

14r - 15s = -16

Answer: (1,2)

4) 2x - 7y = 42

4x - 14y = 64

Answer: No Solution ??

5) 9x + 12y = 15

3x + 4y = 5

Answer: Identity ??

6) 2 = 4s - 3t

2 = 12s - 9t

Answer: No Solution ??

7) 3a - 6b = 18

4a + 8b = 24

Answer: (6,0)

If I got any of these wrong, can someone please show me the right way to do them?

These I have no idea on how to do them.

8) 4x +8y = 5

5x +10y = 13

9) 13 = 8a - 8b

6 = 4a - 5b

10) 160 = 2x - 10y

120 = 3x - 15y

Can anyone show me how to do these ones, I keep trying to solve them, but keep getting the wrong answer?

- not please help--math -
**DrBob222**, Wednesday, February 25, 2009 at 9:23pmmath help needed.

- Veronica or Lily ? -
**Reiny**, Wednesday, February 25, 2009 at 9:50pmThere may not be tutors available for your subject and question at all times.

Have patience.

You posted this again about 1/2 hour after your first post of this question

You have to keep checking back to see if your received an answer, sometimes it might take over an hour or even more.

I gave you an answer in

http://www.jiskha.com/display.cgi?id=1235612870

I did not answer your first part, because all you have to do is check if your answers work in both of the two equations.

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