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5x[(29x87+a)-4x513]:2=1375

Răspuns :

5x[(29x87+a)-4x513]:2=1375
5x[(2423+a)-2052]:2=1375
5x[(2423+a)-2052]=1375:2
5x[(2423+a)-2052]=688
5x[a+2423-2052]=688
5x[a+371]=688
5xa=688-371
5xa=317
5x317
1585