Помогите!!!SOS!! 85-(17+икс)=39 (67+икс)-14=78
85-(17+х)=39 17+х=85-39 17+х=46 х=46-17 х=29 (67+х)-14=78 67+х=78+14 67+х=92 х=92-67 х=25
85-(17+х)=39 (67+х)-14=78 17+х=85-39 67+х=78+14 17+х=44 67+х=92 х=44-17 х=92-67 х=27 х=25 ____________ _______________ 85-(17+27)=39 (67+25)-14=78 39=39 78=78