TO ANY MATH HELPERS
posted by Miley on .
Pleeeese help!
Use the substitution method to solve each linear system:
x+3y+1=0
3xy+1=0
4x3y=13
2x+y=4
Please help, thanks:):)!!!!

1)
x= .5
y= .5
2)
x=.5
y=5 
1.
from the 1st equation: x = 3y+1
into the 2nd:
3(3y+1)  y +1 = 0
9y + 3  y +1 = 0
8y = 4
y = 1/2
sub into 2nd:
3x  (1/2) + 1 = 0
3x = 3/2
x = 1/2
Do #2 the same way
from the 2nd: y = 2x+4
etc
(Just stating the answers is not acceptable and serves no purpose) 
Oh thank you to both helpers!!! I have understood how to do it now:)