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[(3*X+4)*2+5]*3+5=170

Răspuns :

[(3*x+4)*2+5]*3=170-5=165
(3*x+4)*2+5]=165:3=55
(3*x+4)*2=55-5=50
3*x+4=50:2=25
3*x=25-4=21
x=21:3
x=7