SOLUTION: Solve the system of equations 3x+4y+z=7 2y+z=3 -5x+3y+8z=-31 Please Help

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Question 922594: Solve the system of equations
3x+4y+z=7
2y+z=3
-5x+3y+8z=-31
Please Help
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

......eq.1
.........eq.2
......eq.3
__________________________________
......eq.2 ...solve for


......eq.1...plug in


......solve for



......eq.3..plug in and
...solve for
...both sides multiply by


.....both sides multiply by




go to plug in




go to plug in





so, , , and

check:
......eq.1




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