The book College Algebra was written by author James Harrington Boyd Here you can read free online of College Algebra book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is College Algebra a good or bad book?
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274 COLLEGE ALGEBRA L??258, 259 If / = 4, etc., or — 1, — 2, etc., the values of x or of »/ will be negative. 268. To solve the equation ax-\-hy-\- cz = d in positive integers one may proceed thus: write it in the form ax+ hy ^=id — rz, then give to z the values 1, 2, 3, . . in succession and determine in each case the values of x and y by the preceding articles. 259. General solution of two simultaneous equations in three unknown quantities. Solve in integral values the equations, (1) ax-\-hy-...^cz^:zd (2) aU + h'y + c'z = d\ Eliminate, «, for example, we obtain an equation connecting the other two variables, Ax-\- By = (\ suppose. Now if ^l and B have only such common factors as are contained in C, then proceeding as in §2256, 257 we may find (3) x= 1+ nt, y =m-^ At . Substitute now these values in either equation (1) or (2) and obtain an equation in t and z, which can be written AU -\- h'z = (?. If A' and B* do not contain any common factors except such as are also common to C", we may write (4) tz=VJ^ B't', z-w!
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