SOLUTION: can you help me please? Solve by graphing. estimate answers to nearest half unit if nescessary. x - 2y = -6 y = -3/2x -1

Algebra ->  Expressions-with-variables -> SOLUTION: can you help me please? Solve by graphing. estimate answers to nearest half unit if nescessary. x - 2y = -6 y = -3/2x -1      Log On


   

Question 44067: can you help me please? Solve by graphing. estimate answers to nearest half unit if nescessary.
x - 2y = -6
y = -3/2x -1
Answer by adamchapman(301) About Me  (Show Source):
You can put this solution on YOUR website!
You have 2 equations to start with:
x+-+2y+=+-6 (..1)
y+=+%28%28-3%2F2%29x%29+-1 (..2)
Rearrange equatiom (..2) to give x in terms of y:
x=2y-6 (..3)
Now substitute equation (..3) into equation (..2) for x:
y=%28%28-3%2F2%29%282y-6%29%29-1
y=-3y%2B6-1
4y=5
y=5%2F4 (..4)
Now substitute equation (..4) into equation (..3) for y:
x=2%285%2F4%29-6
x=10%2F4-6
x=2.5-6
x=-3.5
I hope this helps
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk