SOLUTION: Method of Substitution 5. Find the point of intersection of each pair of lines. d) a+b+6=0 2a-b-3=0 Pleasee i am really confused i dont get it

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Method of Substitution 5. Find the point of intersection of each pair of lines. d) a+b+6=0 2a-b-3=0 Pleasee i am really confused i dont get it      Log On


   

Question 181852: Method of Substitution
5. Find the point of intersection of each pair of lines.
d) a+b+6=0
2a-b-3=0
Pleasee i am really confused i dont get it
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


5. Find the point of intersection of each pair of lines.





Since you need to use the Substitution method, you need to solve one of the equations so that you get one of the variables (it doesn't matter which) on one side of the equals sign and everything else on the other side.

Let's begin with equation (1), add -b -6 to both sides:



Now you can use the same process I showed you when I solved question 181836 for you earlier today:

http://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.181836.html

Once you have determined the values for a and b, create the ordered pair (a,b) and that will be the point of intersection of the two lines represented by your two equations.

John