August 2018 2 11 Report
A)6x-12y+x do kwadratu; x=3, y=10
b)15-3x+7a; a=jedna siódma, x=jedna trzecia
c)4z-15y; y=jedna pietnasta, z= -jedna czwarta
d)3x-2y+5; x=3, y=7
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