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April 20, 2014

April 20, 2014

Posted by **angel** on Monday, January 31, 2011 at 4:48pm.

my teacher gave me the answer an problem but she wants me 2 work it out

idk how i keep gettin fractions

the problem is:

-3x-4y=21

8x-5y=-9

please help

- algebra -
**helper**, Monday, January 31, 2011 at 5:03pmMultiply by -5 (-3x - 4y = 21)

Multiply by 4 (8x - 5y = -9)

15x + 20y = -105

32x - 20y = -36

47x + 0 = -141

47x = -141

x = -3

8x - 5y = -9

x = -3

8(-3) - 5y = -9

-24 - 5y = -9

-5y = 15

y = -3

- algebra -
**angel**, Monday, January 31, 2011 at 5:11pmty

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