srednia arytmetyczna liczb 2,2,3,3,3,x8,9,wynosi 4,5 oblicz x
8*4,5=36
2+2+3+3+3+8+9=30
x=36-30
x=6
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8*4,5=36
2+2+3+3+3+8+9=30
x=36-30
x=6