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December 21, 2014

December 21, 2014

Posted by **Anonymous** on Tuesday, January 22, 2013 at 11:09pm.

(1/2x)+(3/4y)=(-1/4) and (3/4x)-(1/4y)=1

Can you please help?

- Pre-Calculus -
**Steve**, Wednesday, January 23, 2013 at 1:01pmfirst, I'd get rid of those pesky fractions:

2x + 3y = -1

3x - y = 4

Now you can see that y = 3x-4, so substitute that back in the 1st equation:

2x + 3(3x-4) = -1

2x+9x-12 = -1

11x = 11

x = 1

so, y=3x-4 = -1

be sure to check that the answer fits the original equations.

- Pre-Calculus -
**Caroline**, Thursday, January 24, 2013 at 1:14amThank you.

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