Mathematics, 24.05.2020 07:59 anarosa331hotmailcom

2m + 2n - 4r = 4
m - 2n + 3r = -4
-7m + 20n - r= 2

Answers: 2

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2m + 2n - 4r = 4
m - 2n + 3r = -4
-7m + 20n - r= 2...