а)26х+27+19х=387
45х=387-27
45х=360
х=360 :45
х=8
б)2.784:(37-х:26)=116
37-х:26=2,784 :116
37-х:26=0,024
х:26=37-0,024
х:26=36,976
х=36,976*26
х=961,376
в)(х-252)+585=1498
х-252=1498-585
х-252=913
х=913+252
х=1165
г)1946-(1207-х)=7204
1946-1207+х=7204
739+х=7204
х=7204-739
х=6465