Ответ:
- x = 900 − 455 = 445.
- x = 25 489 − 5 055 = 20 434.
- x = 54 − 45 = 9.
- x = 89 − 43 = 46.
- c = 1 500 − 758 = 742.
- x = 23 − 1 = 22.
- x = 270 : 30 = 9.
- c = 360 : 6 = 60.
- a = 120 : 3 = 40.
- c = 720 : 80 = 9.
- c = 450 : 150 = 3.
- x = 3 500 : 7 = 500.
- x = 1 000 : 100 = 10.
- a = 56 − 7 = 49.
- 120 : 40 = 3 — верное равенство, неизвестного нет.
- x = 1 200 − 500 = 700.
- x = 500 : 25 = 20.
- x = 90 + 45 = 135.
- x = 580 : 58 = 10.
- a = 54 000 − 45 = 53 955.
- a = 199 + 66 = 265.
- x = 2 100 − 968 = 1 132.
- x = 74 − 50 = 24.
