Question 559841
{{{ x/12 = x/13 - 12 }}}
Multiply both sides by {{{ 12*13 }}}
{{{ 13x = 12x - 12*12*13 }}}
{{{ 13x = 12x - 1872 }}}
{{{ x = -1872 }}}
check answer:
{{{ x/12 = x/13 - 12 }}}
{{{ -1872/12 = -1872/13 - 12 }}}
{{{ -156 = -144 - 12 }}}
{{{ -156 = -156 }}}
OK