SOLUTION: Please assistance in solving equation for x. {{{A=(matrix(3,3,2,2,0,-4,-3,2,0,-3,-5))}}}, {{{B=(matrix(3,1,-10,2,-9))}}}, {{{X=(matrix(3,1,x,y,z))}}}, {{{AX=B}}}

Question 151249: Please assistance in solving equation for x.
, , ,
Answer by Edwin McCravy(20065) (Show Source): You can put this solution on YOUR website!
Please assistance in solving equation for x.
, , ,


We make the equation 

 

Do you know how to find the inverse of a matrix?
If not post again asking how.  The inverse of 
matrix A is:



So we left-multiply both sides of the equation by this
inverse matrix, 



Do you know how to multiply matrices?  If not
post again asking how.

Multiply the matrices and get this:





So , , 

Edwin

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