Question 808369
Let {{{ x }}} = ml of pure water to be added
{{{ .15*50 = 7.5 }}} ml of minoxydil in 15% solution
{{{ 7.5 / ( x + 50 ) = .1 }}}
{{{ 7.5 = .1*( x + 50 ) }}}
{{{ 7.5 = .1x + 5 }}}
{{{ .1x = 2.5 }}}
{{{ x = 25 }}}
25 ml of pure water should be added