Răspuns :
[(2x150x3)-475]x12=
[(300x3)-475]x12=
(900-475)x12=
425x12=
5100
[(300x3)-475]x12=
(900-475)x12=
425x12=
5100
{[(150x3)x2]-475} x 12 = [(450x2)-475] x 12 = (900-475) x 12 = 425 x 12 = 5100