8x + 7y = -50

=3x + y = 26

What is the ordered pair for these?

Please show the work so I can understand how you achieved it.

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- Jun 29th 2010, 06:42 AMOneidaFLSolution in ordered pairs for the following
8x + 7y = -50

=3x + y = 26

What is the ordered pair for these?

Please show the work so I can understand how you achieved it. - Jun 29th 2010, 07:20 AMp0oint
Any efforts to solve it?

Hint: multiply the second equation by -7 and sum (1) and (2) equation.

Write here what you got.

- Jun 29th 2010, 07:31 AMOneidaFL
I tried that and this is what I got....

8x + 7y = -50

-3x + y = 26

8x + 7y = -50

__21x -7y = -182__

29x = 232

Divide both by 29

X = 8

I then plug in 8 into one of the equations to solve for y

-3(8) + Y =26

-24 + Y = 26

Y = 26 + 24

Y = 50

8(8) + 7 (50) = -50

64 + 350 = -50 (false)

and this is where I am having a hard time. What am I doing wrong? - Jun 29th 2010, 07:42 AMskeeter
- Jun 29th 2010, 07:49 AMp0oint
x=-8.

Double check your work. - Jun 29th 2010, 09:57 AMOneidaFL
Well so much for work smart, not hard.. I forgot the negative on 232. Now I was able to work it out. You are the greatest. I did not just get the answer by myself, you helped me to accomplish that.! Thanks