42 х+19 х-16=1448

936: (8 х-17) = 24

1) 42 х + 19 х = 1448 + 16

61 х = 1464

х = 1464 : 61

х = 24

2) 936 = 24 * (8 х - 17)

936 : 24 = 8 х - 17

39 = 8 х - 17

39 + 17 = 8 х

8 х = 56

х = 56:8

х = 7

1)

42 х + 19 х - 16 = 1.448

61 х = 1.448 + 16

61 х = 1.464

х = 1.464 : 61

х = 24

проверка:

42 * 24 + 19 * 24 - 16 = 1.448

1.008 + 456 - 16 = 1.448

1.448 = 1.448

2)

936 : (8 х - 17) = 24

8 х - 17 = 936 : 24

8 х - 17 = 39

8 х = 39 + 17

8 х = 56

х = 56 : 8

х = 7

проверка:

936 : (8 * 7 - 17) = 24

936 : (56 - 17) = 24

936 : 39 = 24

24 = 24