SOLUTION: Need help with the problem below.Thanks in advance. Systems of Equations Solve the following problems for X and Y in these two system equations, and for X and Y and Z, in these

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Need help with the problem below.Thanks in advance. Systems of Equations Solve the following problems for X and Y in these two system equations, and for X and Y and Z, in these      Log On


   

Question 330485: Need help with the problem below.Thanks in advance.
Systems of Equations
Solve the following problems for X and Y in these two system equations, and for X and Y and Z, in these three system equations.
X+10Y+Z=52.....5X+Y+4Z=15.....X+2y-3Z=12..... X=? Y=? Z=?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
[A][x]=[b]
.
.
.
[A]=%28matrix%283%2C3%2C1%2C10%2C1%2C5%2C1%2C4%2C1%2C2%2C-3%29%29
[b]=%28matrix%283%2C1%2C52%2C15%2C12%29%29
.
.
.
det[A]=188
.
.
.
[A]inv=-%281%2F188%29%2A%28matrix%283%2C3%2C-11%2C32%2C39%2C19%2C-4%2C1%2C9%2C8%2C-49%29%29
.
.
.
[x]=[A]inv[b]=%28matrix%283%2C1%2C2%2C5%2C0%29%29