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October 20, 2014

October 20, 2014

Posted by **Anonymous** on Friday, April 20, 2012 at 9:54pm.

1. 3x-3y=24 and 2x+5y=-37

2. -9x+10y=-2 and 45x-50y=11

3. -9x-3y=-3 and 18x+6y=6

4. -5x-6y=-23 and 8x+7y=29

5. 9x-7y=4 and 5x+3y=-46

- MATH -
**Reiny**, Friday, April 20, 2012 at 11:10pmI will do the last one, you do the others

5.

9x - 7y = 4

multiply each term by 3 ---> 27x - 21y = 12

5x + 3y = -46

multiply each term by 7 ---> 35x + 21y = -322

add these last two equations

62x = -310

x = -5

sub into

5(-5) + 3y = -46

3y=-21

y = -7

x= -5, y = -7

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