Question 678678
Let {{{ x }}} = the original price of the drill
given:
{{{ x - .2x = x - .25x + 4 }}}
{{{ .8x = .75x + 4 }}}
{{{ .05x = 4 }}}
{{{ x = 4/.05 }}}
{{{ x = 80 }}}
The original pice was $80
check:
{{{ x - .2x = x - .25x + 4 }}}
{{{ 80 - .2*80 = 80 - .25*80 + 4 }}}
{{{ 80 - 16 = 80 - 20 + 4 }}}
{{{ 64 = 64 }}}
OK