题目

Help Wanted: PAINTER Must have at least 3 years painting experience. Commercial and new construction work. $ 10/hr. Immediate opening. Call 435-9201 with work history. SECRETARY Part-time position available in friendly, busy office. Good typing and general office skills. Some weekends required. High pay. Various duties. Apply(申请) at East Side Management, 500 Park Drive, DeWitt, NY. 13214. VETERINARIAN ASSISTANT(兽医助理) Person needed for busy animal hospital. Some nights and weekends. Apply in person to Johnson-Marks Animal Hospital, 404 Snow Road, Syracuse, NY. 13224. After 已知方程（a-1）x|a|=1是一元一次方程，则a=________．