Linear equations and lines / 

 - 2nd ed. 
 - Menlo Park, Calif. :  Benjamin/Cummings Pub. Co.,  c1981. 
 - xii, 146 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equations.<br/>Algebra
<br/><br/><label>Dewey Class. No.: </label>512 BEN 1981 A060 Or.  512.9/4