Question 1155892
Let {{{ x }}} = the miles / gallon for the 1st car
{{{ 60 - x }}} = the miles / gallon for the 2nd car
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{{{ 40x + 30*( 60 - x ) = 2150 }}}
{{{ 40x + 1800 - 30x = 2150 }}}
{{{ 10x = 350 }}}
{{{ x = 35 }}}
{{{ 60 - x = 60 - 35 }}}
{{{ 60 - x = 25 }}}
35 miles / gallon for the 1st car
25 miles / gallon for the 2nd car
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check:
{{{ 40x + 30*( 60 - x ) = 2150 }}}
{{{ 40*35 + 30*25 = 2150 }}}
{{{ 1400 + 750 = 2150 }}}
{{{ 2150 = 2150 }}}
OK