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МатематикаВопрос:
20. 4(1.2b + 3.7) - 2.8 = 5.2b
Ответ:
4.8b + 14.8 - 2.8 = 5.2b
4.8b + 12 = 5.2b
-0.4b = -12
b = 30
4.8b + 12 = 5.2b
-0.4b = -12
b = 30
Похожие
- 1. 5x + 4 = x + 12
- 2. 13 - 5y = 8 - 2y
- 3. 5x + (3x - 7) = 9
- 4. 3y - (5 - y) = 11
- 5. (7a + 1) - (6a + 3) = 5
- 6. (8s + 11) - 13 = 9s - 5
- 7. (5x - 3) + (7x - 4) = 8 - (15 - 11x)
- 8. (7 - 5k) - (8 - 4k) + (5k + 6) = 8
- 9. 2x + 5 = 2(x + 1) + 11
- 10. 15(v + 2) - 30 = 15v
- 11. 5(3x + 1.2) + x = 6.8
- 12. 0.4b + 3 = 0.2(3b + 1) - b
- 13. 6(x - 1) = 9.4 - 1.7x
- 14. 3.5 - 9a = 2(0.5a - 4)
- 15. 3(2.4 - 1.1m) = 2.7m + 3.2
- 16. 3(x - 1) = 2(2 - x) + 6
- 17. 4(3 - h) - 11 = 7(2h - 5)
- 18. -3(3y + 4) + 4(2y - 1) = 0
- 19. 0.3(5x - 7) = 3(0.2x + 3.2)
- 21. 0.9(4y - 2) = 0.5(3y - 4) + 4.4
- 22. 4(0.2x - 7) - 5(0.3x + 6) = 5
