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10X3X9-30:3:10+11=7xf

Răspuns :

270 - 1 + 11 = 7 • f
289 = 7 • f
f = 289 : 7
f = 41,(3)
10X3X9-30:3:10+11=7XF
270-11+11=7XF
289=7XF
7XF=289
F=289:7
F=41REST 2