Question 317011
{{{(matrix(2,2,1,-3,7,5))+3*(matrix(2,2,a1,a2,a3,a4))=(matrix(2,2,10,-6,-2,6))}}}
{{{(matrix(2,2,1,-3,7,5))+(matrix(2,2,3a1,3a2,3a3,3a4))=(matrix(2,2,10,-6,-2,6))}}}
.
.
.
{{{ 1+3a1=10}}}
{{{3a1=9}}}
{{{a1=3}}}
.
.
{{{ -3+3a2=-6}}}
{{{3a2=-3}}}
{{{a2=-1}}}
.
.
{{{ 7+3a3=-2}}}
{{{3a3=-9}}}
{{{a3=-3}}}
.
.
{{{ 5+3a4=6}}}
{{{3a4=1}}}
{{{a4=1/3}}}
.
.
[A]={{{(matrix(2,2,3,-1,-3,1/3))}}}