September 2019 0 4 Report
Zredukuj (uprość) podane wyrażenia algebraiczne i oblicz ich wartość liczbową.

a) 5x-7+x+15-2x=? x=2
b) 1/2y-3-2y+5,1/2y+1/2=? y=1
c) -6x+2y+7+4x-5y-3=? x=0,5 y=0,1
d) 2x-6y-4y+8-5x+y-11=? x=-1,1/3 y=1/9

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