Question 644556
{{{ Let {{{ x }}} = gallons of color in 1440 
gallons of paint
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paint = base + color
base = paint - color
given:
base / color = 15 / 1 
( paint - color ) / color = 15/1 
{{{ ( 1440 - x ) / x = 15 / 1 }}}
{{{ 1440 - x = 15x }}}
{{{ 16x = 1440 }}}
{{{ x = 90 }}}
There are 90 gallons of color in 1440 gallons of paint
check:
{{{ ( 1440 - x ) / x = 15 / 1 }}}
{{{ ( 1440 - 90 ) / 90 = 15 / 1 }}}
{{{ 1350 / 90 = 15/1 }}}
{{{ 15 = 15 }}}
OK