Răspunsuri

2014-07-02T22:48:42+03:00
[(80+9)*2+80-6x]=30*7

(89*2+80-6x)=210

(178+80-6x)=210

258-6x=210

-6x=210-258

-6x=-48

6x=48

x=48:6

x=8
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