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Mathematics 11 Online
OpenStudy (anonymous):

3x-y=11 5x+3y=9

jimthompson5910 (jim_thompson5910):

3x-y=11 5x+3y=9

jimthompson5910 (jim_thompson5910):

You can multiply both sides of equation 1 by 3 to go from 3x-y=11 to 9x-3y=33

jimthompson5910 (jim_thompson5910):

so we have this new system 9x-3y=33 5x+3y=9

jimthompson5910 (jim_thompson5910):

in which when you add them together, you get this result 9x-3y=33 5x+3y=9 --------- 14x+0y = 42 so... 14x = 42 ---> x = ???

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