Hard word problem for me :S

Postby romeroroma » Fri May 04, 2012 6:41 pm

hey all. here is the word problem am having troubles in. they wana me to use gaus elimination method to solve it u now equations matrices and this stuff. and am rly bad at word problems so i wish for u all to help me please.

A chemical manufacturer wants to lease a fleet of 24 railroad tank cars with a combined carrying capacity of 420.000 gallons.. Tank cars with three different carrying capacities are available : 7.000 gallons, 14.000 gallons, and 28.000 gallons. How many each type of tank car should be leased ?.

he also said let X1 be the number of cars with a 7.000 gallon capacity, X2 be the number of cars with 14.000 gallon capacity. and X3 be the number of cars with a 28.000 gallon

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