Rozwiąż rówanie :a ) 3 ( y + 6) - y = 2 ( y + 9 )
3y+18-y=2y+18
3y-y-2y=18-18
0=0
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3y+18-y=2y+18
3y-y-2y=18-18
0=0
3y+18-y=2y+18
3y-y-2y=18-18
0=0