SOLUTION: Solve each system by substitution
-x-y-3z=-9
Z=-3x-1
X=5y-z+23
Algebra.Com
Question 1101280: Solve each system by substitution
-x-y-3z=-9
Z=-3x-1
X=5y-z+23
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Sub for z in the 1st and 3rd equations.
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