Question 1154520
Let {{{ x }}} = the width, W
{{{ 3x }}} = the length, L
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The formula for perimeter, P, is:
{{{ P = 2L + 2W }}}
{{{ P = 2*( 3x ) + 2x }}}
{{{ 24 = 6x + 2x }}}
{{{ 8x = 24 }}}
{{{ x = 3 }}}
and
{{{ 3x = 9 }}}
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Let {{{ A }}} = the area
{{{ A = W*L }}}
{{{ A = x*3x }}}
{{{ A = 3*9 }}}
{{{ A = 27 }}}
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check:
{{{ P = 2*( 3x ) + 2x }}}
{{{ P = 2*9 + 2*3 }}}
{{{ P = 18 + 6 }}}
{{{ P = 24 }}}
OK