Question 1095968
Let {{{ x }}} = the uniform width of the frame
The short dimension of picture + frame =
{{{ 10.5 + 2x }}}
The long dimension is:
{{{ 14 + 2x }}}
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I can say:
{{{ ( 10.5 + 2x ) / ( 14 + 2x ) = 5/6 }}}
{{{ 6*( 10.5 + 2x ) = 5*( 14 + 2x ) }}}
{{{ 63 + 12x = 70 + 10x }}}
{{{ 2x = 7 }}}
{{{ x = 3.5 }}}
The width of the frame is 3.5 in
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check:
{{{ ( 10.5 + 2*3.5 ) / ( 14 + 2*3.5 ) = 5/6 }}}
{{{ 17.5 / 21 = 5/6 }}}
{{{ 6*17.5 = 5*21 }}}
{{{ 105 = 105 }}}
OK