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OpenStudy (anonymous):
How do you cancel out E or F in this equation using multiplication? 5e+4f=9 4e+5f=9
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jimthompson5910 (jim_thompson5910):
notice how adding up the equations gives you 5e+4f=9 4e+5f=9 -------- 9e+9f=18 we want either the e or f to be eliminated, but that doesn't happen here
jimthompson5910 (jim_thompson5910):
which variable do you want to eliminate? e? or f?
jimthompson5910 (jim_thompson5910):
either one works
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