... Exercises Linear Algebra Jim Hefferon21131 23 121x1·13x · 1 2x · 3 121686 28 18 Linear Algebra, by ... dm(this is straightforward cancelling on both sides of the i-th equation), which says that (s1, . . . , sn)10 Linear Algebra, by Hefferonsolvesa1,1x1+ a1,2x2+ ··· + a1,nxn= d1...ai,1x1+ ... obtain the systems−x + y = −1x − y = 1x + y = 1x + y = 1both of which have an infinite number of solutions.16 Linear Algebra, by HefferonOne.I.2.31 This is how the answer was given in the...