SOLUTION: How do I find X,Y,and Z?
X+y-2z=15
-x+2y+z=2
2x+3y-z=9
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Question 1045709: How do I find X,Y,and Z?
X+y-2z=15
-x+2y+z=2
2x+3y-z=9
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
..........(1)
..........(2)
..........(3)
start with first two equations
..........(1)
..........(2)
--------------------------------add
......solve for
................(1a)
go to
..........(2)......both sides multiply by
..........(3)
-----------------------------
..........(2)
..........(3)
--------------------------------------add
......solve for
................(1b)
from 1a and 1b we have
..................solve for
now we can find
................(1b)
now, go to ..........(1), substitute and and solve for
so, your solutions are:
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