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April 21, 2015

Posted by **Mayank** on Monday, July 16, 2012 at 2:32am.

3x + 7y + 5= 0

4x - 3y - 8 = 0

Find p; if:

px + y - 1= 0

- Math -
**Shen**, Monday, July 16, 2012 at 3:52am3x+7y=-5 (i)

4x-3y=8 (ii)

(i)x 4:

12x+28y=-20 (iii)

(ii)x 3:

12x-9y=24 (iv)

(iv)-(iii):

-37y=44

y=-44/37

subs y into (i):

3x+7(-44/37)=-5

3x= -5+308/37

x=148/37

- Math - fix -
**Steve**, Monday, July 16, 2012 at 11:11am3x = -185/37 + 308/37 = 123/37

x = 41/37

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