# Please help! [closed]

11x+15y+23=0, 7x-2y-20=0 I tried,

11x+15y+23=0------1 7x-2y-20=0-----------2

11x+15y=-23 =>y=-23x-11x/15 (substituting the value of y in eq 2)

11x+15(-23x-11x/15)=20

Please help! [closed]

11x+15y+23=0, 7x-2y-20=0 I tried,

11x+15y+23=0------1 7x-2y-20=0-----------2

11x+15y=-23 =>y=-23x-11x/15 (substituting the value of y in eq 2)

11x+15(-23x-11x/15)=20

close date 2014-07-18 20:23:14.633861

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var("x y")
solve( [11*x+15*y+23 ==0, 7*x-2*y-20 == 0], [x,y] )

- Ch 1, Sec 2 "Intersecting Two Lines, Part One"
- Ch 1, Sec 3 "Intersecting Two Lines, Part Two"

- Go to www.gregorybard.com
- Click on "Finite Math" on the left hand side of the page
- Each section is its own pdf file.

Asked: **
2014-07-18 14:35:35 -0500
**

Seen: **263 times**

Last updated: **Jul 18 '14**

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