Solving Equations

[twins12]

Find all real number solutions to the system of equations:
xy=4
y=4x
List your answers as pairs (x,y)

 

[tutor_joel]

solve by substitution. there will be 2 paired answers.
ie.

eq1. xy=4
eq2. y=4x

substitute 4x from eq2 into eq1 for the value of y. Yeilding,

x(4x)=4

you have it from here?