October 2018 2 10 Report

Matematyka z plusem, klasa 2 gim , zadanie 5 / str. 99.

Rozwiąż układy równań metodą podstawienia

a) x + 3y = 3 x - y = 5

b)2x - y = 10 x + 5y = - 17

c) 3m + n = 9 2m - 5n = -11


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