Х+(23+37)*50=45*100
х+60*50=4500
х+3000=4500
х=4500-3000
х=1500
х-(81-72)*100=50*40
х-9*100=2000
х-900=2000
х=2000+900
х=2900
(83-75)*1000-х=30*60
8*1000-х=1800
8000-х=1800
х=8000-1800
х=6200
(82+18)*37+х=80*90
100*37+х=7200
3700+х=7200
х=7200-3700
х=3500
(15х-14х)-1683=23*10
х-1683=230
х=230+1683
х=1913
2832+(23х-22х)=38*100
2832+х=3800
х=3800-2832
х=968
4823+(23х-22х)=60*90
4823+х=5400
х=5400-4823
х=577
(78х-77х)-41*10=289
х-410=289
х=289+410
х=699