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December 19, 2014

December 19, 2014

Posted by **kathy** on Monday, November 29, 2010 at 10:40pm.

3x+2y=-22

5x-9y=25

- math urgent! -
**Reiny**, Monday, November 29, 2010 at 10:49pmfirst one times 9 ---> 27x + 18y = - 198

2nd one times 2 ---> 10x - 18y = 50

add them : 37x = -148

x = -4

I will let you finish it.

- math urgent! -
**Jen**, Monday, November 29, 2010 at 10:52pm3x+2y=-22 (1)

5x-9y=25 (2)

Multiply (1) by 9 and (2) by 2 to get the y's to cancel

27x+18y=-198 (3)

10x-18y=50 (4)

Add (3) and (4) together

37x=-148

Divide both sides by 37

x=-4

Substitute that in either original equation (1) or (2) to solve for y. Check to make sure it works for the other equation, as well.

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