Question

I. Решите уравнение: 1. 145 - (x + 45) = 50 2. (39 + x) - 27 = 22 3. 6x + 131 = 437 4. 490 - у • 7 = 350 5. k : 16 - 109 = 231 6. 8 • (x- 7) = 1080 7. (k + 11): 23 = 27 8. 900 : (210 +x) =36 9. 40 + x: 70 = 54 10. 67 - 36 : x = 55

Answer 1

Вот думаю правильно)

Answer 2

1. 145 - (x + 45) = 50 Решение: 145 - x - 45 = 50 100 - x = 50 -x = 50 - 100 -x = -50 x = 50

2. (39 + x) - 27 = 22 Решение: 39 + x - 27 = 22 39 + x - 27 - 22 x + 12 = 22 x = 22 - 12 x = 10

3. 6x + 131 = 437 Решение: 6x = 437 - 131 6x = 306 x = 306 / 6 x = 51

4. 490 - у • 7 = 350 Решение: 490 - 7у = 350 -7у = 350 - 490 -7у = -140 у = -140 / -7 у = 20

5. k : 16 - 109 = 231 Решение: k / 16 - 109 = 231 k / 16 = 231 + 109 k / 16 = 340 k = 340 * 16 k = 5440

6. 8 • (x - 7) = 1080 Решение: 8(x - 7) = 1080 8x - 56 = 1080 8x = 1080 + 56 8x = 1136 x = 1136 / 8 x = 142

7. (k + 11) / 23 = 27 Решение: k + 11 = 23 * 27 k + 11 = 621 k = 621 - 11 k = 610

8. 900 / (210 + x) = 36 Решение: 900 = 36(210 + x) 900 = 7560 + 36x 36x = 900 - 7560 36x = -6660 x = -6660 / 36 x = -185

9. 40 + x / 70 = 54 Решение: 40 + x / 70 = 54 x / 70 = 54 - 40 x / 70 = 14 x = 14 * 70 x = 980

10. 67 - 36 / x = 55 Решение: 67 - 36 / x = 55 36 / x = 67 - 55 36 / x = 12 x = 36 / 12 x = 3