August 2018 3 17 Report
Równania,układy równań.
Rozwiąż równania.
a)2(3x+4)-3(5x-6)+4(7x+8)=115
b)-0,8(10-2x)+1,2(x-20)+⅕x=-58
c)x(x-5)-x(x+4)=-63
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