December 2018 1 6 Report
POMOCY MATEMATYKA

Rozwiąż równania:

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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