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September 21, 2014

September 21, 2014

Posted by **mysterychicken** on Wednesday, May 6, 2009 at 10:30am.

Give any three ordered pairs that are solutions of the equation:

1. x-y=6

(12,6)

(10,4)

(15,9)

2.-3x - 2y = 0

???

3.2x- 3y = 12

I have only one ordered pair for this:

(9,2)

2 more needed

Thanks!

-MC

- Pre-Algebra -
**RickP**, Wednesday, May 6, 2009 at 10:45amIt would be easier if you solve the equations for y, then plug in a value for x.

-3x - 2y = 0

add 3x to both sides

-2y = 3x

divide both sides by -2

y = (-3/2) x

Now just pick numbers for x (because of the 2 in the denominator, it will help to pick even integers).

x = 2

y = (-3/2) 2

y = -3

so (2, -3)

x = 0

y = (-3/2) 0

y = 0

so (0, 0)

x = -2

y = (-3/2)(-2)

y = 3

so (-2, 3)

- Pre-Algebra -
**mysterychicken**, Wednesday, May 6, 2009 at 11:21amThank you Rick!!

I need two more for the third one though...

-MC

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