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OpenStudy (anonymous):
Solve by elimination 9x + 2y = 2 21x + 6y = 4
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OpenStudy (anonymous):
can i multiply the first equation by a -3?
OpenStudy (anonymous):
yeah
OpenStudy (aric200):
x= 1 over 3 y= -1 over 2
OpenStudy (anonymous):
-27x-6y=-6 21x +6y= 4 ----------- -6x =-2 x = 1/3
OpenStudy (aric200):
sorry its x= -1 half
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OpenStudy (anonymous):
Good job @Reaper534
OpenStudy (aric200):
negative 1 half
OpenStudy (anonymous):
ahh ok i see then i plug in x to the 2nd equation haha thanks
OpenStudy (anonymous):
Thanks guys
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