SOLUTION: solve the following system: 3x + 4y + x = 14 2y + 7z = 25 -2y + 3z = 5

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: solve the following system: 3x + 4y + x = 14 2y + 7z = 25 -2y + 3z = 5      Log On


   

Question 329973: solve the following system:
3x + 4y + x = 14
2y + 7z = 25
-2y + 3z = 5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
[A]=%28matrix%283%2C3%2C3%2C4%2C1%2C0%2C2%2C7%2C0%2C-2%2C3%29%29
[b]=%28matrix%283%2C1%2C14%2C25%2C5%29%29
.
.
.
det[A]=60
.
.
.
[A]inv=-%281%2F60.0%29%2A%28matrix%283%2C3%2C-20%2C14%2C-26%2C0%2C-9%2C21%2C0%2C-6%2C-6%29%29
.
.
.
[x]=[A]inv[b]
[x]=%28matrix%283%2C1%2C1%2C2%2C3%29%29
.
.
.
%28matrix%283%2C1%2Cx%2Cy%2Cz%29%29=%28matrix%283%2C1%2C1%2C2%2C3%29%29