Anna251
Anna251
13-06-2016
Mathematics
contestada
how to make this a simultaneous equation?
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caylus
caylus
13-06-2016
Hello,
I suppose equations are:
x+y=3 (1)
x+2y=9 (2)
(2)-(1)==>y=6
(1)==>x=3-6
x=-3, y=6
Sol={(-3,6)}
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