Uhh the image is below 25 points

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?