### Home > CCA2 > Chapter 6 > Lesson 6.2.1 > Problem6-103

6-103.

Solve each system of equations below. Homework Help ✎

 $−4x=z−2y+12\\y+z=12−x\\8x−3y+4z=1$ Hint (a):Reorganize the equations so all of the variable terms are on one side and the constants are on the other side.More Help (a):For additional help refer to problem 6-71.

 $3x+y−2z=6\\x+2y+z=7\\6x+2y−4z=12$ Hint (b):See part (a).Answer (b):There are infinite solutions.
 What does the solution in part (b) tell you about the graphs? Hint (c):Think about what this solution would mean in two dimensions. Would this mean the same thing in three dimensions?