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raketka [301]
3 years ago
8

-x-2y=9x+4y=9elimination

Mathematics
1 answer:
tamaranim1 [39]3 years ago
8 0
You add the second equation to the first which eliminates x and leaves you with 2y=18 so you divide 18 by 2 which is 9 so y=9 now you fill in one question for y so do x+4(9)=9 you get x+36=9 now subtract 36 from 9 and you get -27 so x=-27 and y=9
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