G=6x , for x how do you solve that

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

What is the x-intercept and y-intercept of the equation 2x+1. 2o