Question 1111828
Frame?  Picture Border?  Not clear.  One might almost believe you meant that the total area for frame and picture should be  224 square inches.


{{{(8+2x)(10+2x)=224}}}
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{{{2*2(4+x)(5+x)=4*56}}}
{{{(4+x)(5+x)=56}}}
The two factors only differ by 1, and are  {{{7*8=56}}}.


{{{highlight(highlight(x=3))}}}.


Uniform frame width surrounding the picture is  3 inches.