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300-b:14+(7×4+15×20):8=346

Răspuns :

Răspuns:

300-b:14+(7×4+15×20):8=346

300-b:14+(28+300):8=346

300-b:14+328:8=346

300-b:14+41=346

300-b:14=346-41

300-b:14=305

b:14=300-305

b:14=-5

b=-5×14

b=-70