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aflati valoarea lui, x":7x{208-190:[3x(x+1)-56x38]}=1421

Răspuns :

7*{208-190:[3*(x+1)-56*38]}=1421     x= ?
208-190:[3*(x+1)-2128]=1421:7=203
190:[3*(x+1)-2128]=203+208=  411
3*(x+1)-2128=411*190=78090
(x+1)-2128=78090:3=26030
x+1=26030+2128=28158
x=28158-1=28157
x=28157