alfonso7guzman7
alfonso7guzman7
03-10-2020
Mathematics
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Subtitute 2x+y=7 and 3x-y=8
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taaaaan
taaaaan
03-10-2020
2x + y =7 (1)
3x-y=8 (2)
(1) + (2)
5x = 15
x = 3
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