Question 1126696
.


I will answer part I only (questions 1, 2 and 3).


<pre>
I interpret your post in this way (as this matrix equation)


    {{{(matrix(2,2, x, y-2,  z, w+4))}}} + {{{(matrix(2,2, 2, 5,  -2, 4))}}} = {{{(matrix(2,2, 6, 1,  4, 8))}}}.


Am I correct ?     Do you agree ?


If so, then see my answers below.


    1.  find the value of x.

        For x, we have an equation  x + 2 = 6,  which gives  x = 6-2 = 4.

        Your answer is correct in this case.



    2.  Find the value of z.

        For z, we have an equation  z - 2 = 4,  which gives  z = 4 + 2 = 6.

        Your answer is NOT correct in this case.



    3.  Find the value of element a12 in the matrix containing variables.


        Of the three matrices in this equation, the only element a12 containing variables is  (y-2)  of the first matrix.
</pre>

<U>Answered</U>.


---------------


Let me give an advise to you:


<pre>
    When you post to this forum, keep  <U>ONE AND ONLY ONE PROBLEM per post</U>.


    It is the rule, the policy and the requirement of this forum.


    Otherwise, you will get so many information back, that you will not be able to read, to classify and to absorb it.


    In the short form, <U>those who violate this rule</U>, <U>work against themselves</U>.
</pre>