SOLUTION: x-y=-1 3x+y=5

Algebra ->  Geometry-proofs -> SOLUTION: x-y=-1 3x+y=5      Log On


   

Question 404128: x-y=-1
3x+y=5
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x-y=-1.................1
3x+y=5.................2
...
add (1) & (2)
x+3x-y+y=-1+5
4x=4
/4
x=1
,,plug value of x in 1
x-y =-1
1-y=-1
y=1+1
y=2