№363
1) x + 50*50 = 45*100
x + 2500 = 4500
x = 2500 - 4500
x = -2000
2) x - 9*100 = 50*40
x - 900 = 2000
x = 900 - 2000
x = -2900
3) 8*1000 - x = 30*60
8000 - x = 1800
x = 8000 - 1800
x = 6200
4) 100*37 + x = 80*90
3700 + x = 7200
x = 3700 + 7200
x = 9900
№364
1) x - 1683 = 230
x = -1683-230
x = -1913
2) 2832 + x = 3800
x = 2832 + 3800
x = 6632
3) 4823 + x = 5400
x = 4823 + 5400
x = 10223
4) x - 410 = 289
x = -410-289
x = -699
№365
1) (x-213):(43+17)=100
x-213:50-100=0
x = -4,26-100
x = -104,26
2) (2500+x):(83+17)=43
2500+x:100-43=0
x = 25 - 43
x = -18
3) (x+17):(25+975)=57
x+17:1000-57=0
x = 59 - 57
x = 2
4) (x+101):(93+28)=100
x+101:121-100=0
x = 0,83 - 100
x = -99,17
№366 при a = 175, b = 83, c = 100. Подставляем:
1) ac+bc = 175+100+83+100 = 458
2) ac-bc = 175+100-83+100 = 275-183 = 92