[tex]Rozwiąż równanie:
b-4÷5=9-2b-41÷9
(tam gdzie jest podzielić to kreska ułamkowa)
b+2b=9-41/9 +4/53b=9- 4 5/9 + 4/53b= 9- 4 25/45 + 36/453b= 9 - 4 61/453b= 9- 5 16/453b= 3 29/45 3b= 164/46 /3b=164/138b=82/69
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b+2b=9-41/9 +4/5
3b=9- 4 5/9 + 4/5
3b= 9- 4 25/45 + 36/45
3b= 9 - 4 61/45
3b= 9- 5 16/45
3b= 3 29/45
3b= 164/46 /3
b=164/138
b=82/69