Use the given inverse to solve the system of equations.

x-y+z= -4
2y+z= -4
-2x+7y= -1/2

Question

Use the given inverse to solve the system of equations.

x-y+z= -4
2y+z= -4
-2x+7y= -1/2

anonymous · Answer

|dw:1362728222878:dw|

anonymous · Answer

@jim_thompson5910

anonymous · Answer

please i dont know how to do this stuff... :s

anonymous · Answer

@jim_thompson5910 , @AravindG

aravindg · Answer

well in such questions we write the an equation like 

AX=B 

A=coefficient matrix
X=variable matrix 
B= constant matrix 

then we get 

  $$X=A^{-1}B$$

aravindg · Answer

clearly $A^{-1} $ is provided to us in question , B will be a column matrix containing constant . .terms .Find the product  and get x y and z .

anonymous · Answer

can u show me how tho?

aravindg · Answer

well first can you write the two matrices A^-1 and B ?

anonymous · Answer

no thats why im asking u to show me how to find the solution cuz i dont know?

anonymous · Answer

@AravindG can u actually please help me im a visual learner once i figure it out by u showing me how u got the solution then iw ill know for next time :)