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406-4x[3x(30-18;6;3)]=

Răspuns :

406-4x[3x(30-18:6:3)]=
406-4x[3x(30-3:3)]=
406-4x[3x(30-1)]=
406-4x[(3x29)]
406-4x87=
406-348=
58
406-4X[3X(30-3:3)]
= 406-4X[3X(30-1)]
=406-4X[3X29]
= 406-4X87
=406-348
=58
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