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МатематикаВопрос:
22. 3(0.4x + 7) - 4(0.8x - 3) = 2
Ответ:
1.2x + 21 - 3.2x + 12 = 2
-2x + 33 = 2
-2x = -31
x = 31/2
-2x + 33 = 2
-2x = -31
x = 31/2
Похожие
- 1. 8x - 5 = x - 40
- 2. 9 + 13y = 35 + 26y
- 3. 6s + (3s - 2) = 14
- 4. 8y - (7y - 142) = 51
- 5. (6x + 1) - (3 - 2x) = 14
- 6. (6 - 2c) + 4 = -5c - 3
- 7. (10x - 3) + (14x - 4) = 8 - (15 - 22x)
- 8. (7 - 10k) - (8 - 8k) + (10k + 6) = -8
- 9. 6y - 20 = 2(5y - 10) - 4y
- 10. 6(1 + 5v) = 5(1 + 6v)
- 11. 4(x + 3.6) = 3x - 1.4
- 12. 3.4 - 0.6b = 2b - (0.4b + 1)
- 13. -3(y + 2.5) = 6.9 - 4.2y
- 14. 0.5y + 7 = 5(0.2 + 1.5y)
- 15. 4(x - 0.8) = 3.8x - 5.8
- 16. 4(1 - 0.5a) = -2(3 + 2a)
- 17. 2(h - 3) = 3(4 - h) + 5
- 18. 3x + 2(2x - 3) = 8 - 7(x + 2)
- 19. 0.7(5z - 3) = 5(0.1 + 0.5z)
- 20. 4(3 - 2x) + 24 = 2(3 + 2x)
- 21. 0.2(5y - 2) = 0.3(2y - 1) - 0.9
