Решите уравнение:
1993=1+8:(1+8:(1-8:(1+4:(1-4:(1-8x))))).

Ну и уравнение!!8:(1+8:(1-8:(1+4:(1-4:(1-8х))))) =1993-1 8:(1+8:(1-8:(1+4:(1-4:(1-8х)))) ) =19921+8:(1-8:(1+4:(1-4:(1-8х)))) =1/2498:(1-8:(1+4:(1-4:(1-8х))) =1/249-249/2498:(8:(1-8:(1+4:(1-4:(1-8х))) =-248/2491-8:(1+4:(1-4:(1-8х)) =8 * (-249/248)1-8:(1+4:(1-4:(1-8х)) =-249/318:(1+4:(1-4:(1-8х)) =31/31+249/318:(1+4:(1-4:(1-8х)) =280/311+4:(1-4:(1-8х)) =8*(31/280)1+4:(1-4:(1-8х)) =31/354:(1-4:(1-8х)) =31/35-35/354:(1-4:(1-8х)) =-4/351-4:(1-8х) =4 * (-35/4)1-4:(1-8х) =-354:(1-8х) =1+354:(1-8х) =361-8х=1/98х=9/9-1/98х=8/9х=1/9