October 2018 1 33 Report

zbiór zadan zadanie 2 strona 70 .

a) 2(3x+4)-3(5x-6)+4(7x+8)=115

b)-0,8(10-2x)+1,2(x-20)+1/5x=-58

c)x(x-5)-x(x+4)=-63


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