SOLUTION: please solve this system of two equation. xy=1 x=4y Answer is: x=2, y=1/2 or x=-2, y= - 1/2 Thanks.

Algebra ->  Systems-of-equations -> SOLUTION: please solve this system of two equation. xy=1 x=4y Answer is: x=2, y=1/2 or x=-2, y= - 1/2 Thanks.      Log On


   

Question 271079: please solve this system of two equation.
xy=1
x=4y
Answer is: x=2, y=1/2 or x=-2, y= - 1/2
Thanks.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
x=4y
xy=1
.
4y*y=1 substitute 4y for x
4y^2=1
y^2=1/4
y=1/2, y=-1/2
.
Ed