September 2018 2 20 Report
1.Jakimi liczbami należy zastąpić ™ ?
a) 4x+6y=2(™ x+™ y) c) 5(4n+™ k)
b) 2(6a+10)=4(™ a+™ ) d) -3(2x+4)=2(™ x-™ )
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