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Solve each system by elimination X-4y-z=16 X=-2 Y=3z-3
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1 vote
Solve each system by elimination

X-4y-z=16
X=-2
Y=3z-3

User Andrii Radkevych
by
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1 Answer

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Fill in x=-2 and y=3z-3 into the first equation. -2-4(3z-3)-z=16. -2-12z+12-z=16. -13z+10=16. -13z=6. Z=-6/13. Then you fill in z into y=3z-3. 3(-6/13)-3. -18/13-3. -18/13-39/13. Y=-57/13. The answer is (-2,-57/13,-6/13).
User Alchete
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