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March 31, 2015

March 31, 2015

Posted by **Laura** on Friday, December 21, 2012 at 8:42pm.

3y = -1/2x + 2

y= x + 9

- algebra -
**Reiny**, Saturday, December 22, 2012 at 12:57amsub the 2nd into the 1st

3y = (1/2)x + 2

3(x+9) = (-1/2)x + 2

3x + 27 = (-1/2)x + 2

times 2 to get rid of that nasty fraction

6x + 54 = -x + 4

7x = -50

x = -50/7

then y = x+9 = -50/7 + 9 = 13/7

check:

in #1:

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

LS = 3(13/7) = 39/7

RS =(-1/2)(-50/7) + 14/7

= 25/7 + 14/7 = 39/7 = LS

my answer is correct.

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