Question 1126499
Let {{{ a }}} = ml of 8% solution needed
{{{ .08a }}} = ml of minoxidil in 8% solution
{{{ .03*60 = 1.8 }}} = ml of minoxidil in 3% solution
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{{{ ( 1.8 + .08a ) / ( 60 + a ) = .06 }}}
{{{ 1.8 + .08a = .06*( 60 + a ) }}}
{{{ 1.8 + .08a = 3.6 + .06a }}}
{{{ .02a = 1.8 }}}
{{{ a = 90 }}}
90 ml of 8% solution needed
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check:
{{{ ( 1.8 + .08*90 ) / ( 60 + 90 ) = .06 }}}
{{{ ( 1.8 + 7.2 ) / 150 = .06 }}}
{{{ 9 = .06*150 }}}
{{{ 9 = 9 }}}
OK