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December 21, 2014

December 21, 2014

Posted by **sherry** on Thursday, March 22, 2012 at 9:15am.

0.3x+0.2y=5,0.5x+0.4y=11

- Algebra -
**Reiny**, Thursday, March 22, 2012 at 10:19amI would multiply each equation by 10 to get rid of those decimals

3x + 2y = 50 ---> 2y = 50-3x

5x + 4y = 110

sub 2y= 50-3x into the 2nd

5x + 2(50-3x) = 110

5x + 100 - 6x = 110

-x = 10

x = -10

into 2y = 50-3x = 50-3(-10)

2y = 80

y = 40

x = -10, y = 40

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