May 2021 0 7 Report
решите систему уравнений (x1 и x2 ( это НЕ в степени) просто переменные a) 2х1-5х2=9 и  х1+х2=3/5   b) -x1+2x2=4,2 и  х1+х2=3/5   c) 5x1=5x2-1 и  х1+х2=3/5   d)2x1-3=-5x2 х и  х1+х2=3/5
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