Question

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 ?

Answer 1

P+F=840
P-F=360 =>  P=360+F

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

F=240

Answer 2

I think it would cost $120 dollars I'm not quite sure...