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A fax machine and a printer cost a total of $840. If the printer costs $360 more than the fax machine, how much did the fax machine cost ?

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sierracwrites
I think it would cost $120 dollars I'm not quite sure...
14egor
P+F=840
P-F=360 =>  P=360+F

360+F+F=840 F=(840-360)/2

F=240

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