The second volume of the first day of junior high school mathematically solves the ternary linear equations, such as the problem (1) braces: y=2x-7.
Solution: y=2x-7 ① 5x+3y+2z=2 ② Simultaneous ② ③ Eliminate z's 13x+6y=8④, then combine ① and ④ to get x=2, substitute into ① to get y =-3, z =123x-4z = 4③ 4x+9y. ④x7-③x4' s 22z=44, so z=2, substituting y = 5/3, x =-3/47x+5z =19/4③ 4x-9z =17 ① 3x+y+15z = Substitute z = 1/3, y =-2x+2y+3z = 232x+4y+3z = 913x-2y+5z =1② Eliminate Y2X+/kloc-simultaneously.