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30.08.2019 •
Mathematics
Solve 5x+2y=4 x-y=5 (by elimination)i really need
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Ответ:
x=5+y
5 (5+y)+2y= 4
25+5y+2y=4
7y= -21
y= -3
x=5+y
x=5-3 x= 2
Ответ: