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15-4(3x-8)=-1
Va rog!


Răspuns :

15-12x+32=-1
47-12x=-1
47+1=12x
48=12x
12x=48
x=48:12
 x=4
 as simple as that!
verificare
15-4(3*4-8)=-1
15-4*4=-1
15-16=-1
-1=-1
adevarat , bine rezolvat