CPM Homework Help : CCA2 Problem 6-103

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6-103.

Solve each system of equations below.

$−4x=z−2y+12$
$y+z=12−x$
$8x−3y+4z=1$
Hint (a):
Reorganize the equations so all of the variable terms are on one side and the constants are on the other side.

$3x+y−2z=6$
$x+2y+z=7$
$6x+2y−4z=12$
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?

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