October 2018 1 18 Report

1.Uzupełnij równości:

3x(7y-...............)=................-15xdo2

(4a-9)(2b+................)=.............+12a-.............-27

6ado2b-3abdo2+12ab=3ab(................)

2.Rozwiaż układ równań

{2x+y=1

{x-2y=8


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