SOLUTION: have tried many times to solve this problem. a system of 3 equations 2x+y=17 y+z=6 x-z=7 I have several problems of this type I just need help getting started with the first

Question 785517: have tried many times to solve this problem. a system of 3 equations
2x+y=17
y+z=6
x-z=7
I have several problems of this type I just need help getting started with the first problem
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
2x+y=17
y+z=6
x-z=7
=========
x-z=7 --> x = z+7
Sub for x in the 1st eqn
---
2x+y=17
2(z+7) + y = 17
y + 2z = 3
y + z = 6 (Equation 2)
------------------------- Subtract
z = -3
----
x = z + 7
x = 4
---------
y + z = 6
y = 9
--> (4,9,-3)

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