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[ ( x -8 ) : 100 + 30 ] : 10 - 7 = 0

Răspuns :

{(x-8)/100+30}/10-7=0
{(x-8)/100+30}/10=0+7=7
{(x-8)/100+30}=7*10=70
(x-8)/100=70-30=40
(x-8)=40*100=4000
x=4000+8=4008