dear expert  i m facing problem in matrix word problems , basic involved in it is AX=B 
=> X=A-1B   THAT I KNOW  but the problem is that i m unable to get what to keep as A  and X and B .. PLS  give some tips ,,, then only i can proceed to practise it and strengthen it ......

Dear Student ,
 
Please find below the solution to the asked query :

In A we write the coefficients of variables ,In X , we write the variables .In B , we write the constant terms of the equations .For example :-2x+4y-9z=83x+5y-6z=55x+8y-z=4So ,A=24-935-658-1 , B=854 , X=xyz .
 
Hope this information will clear your doubts about the topic .
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