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−2(x − 5) − 12 ≤ 4 + 6(x + 3)

−2x + 10 − 12 ≤ 4 + 6x + 18
−2x − 2 ≤ 6x + 22
−8x ≤ 24
x ≤ −3

User Lilit
by
8.3k points

1 Answer

4 votes

Final answer:

To solve the given inequality, we can simplify each side step by step and combine like terms. The final solution is -14 ≤ x ≤ 10/6 or in decimal form, -2.333 ≤ x ≤ 1.6667.

Step-by-step explanation:

The given inequality is: -2(x - 5) - 12 ≤ 4 + 6(x + 3) - 2x + 10 - 12 ≤ 4 + 6x + 18 - 2x - 2 ≤ 6x + 22 - 8x ≤ 24x ≤ -3

To solve this inequality, we can simplify each side step by step:

  1. Distribute the terms: -2x + 10 - 12 ≤ 4 + 6x + 18 - 2x - 2 ≤ 6x + 22 - 8x
  2. Combine like terms: -2x - 2 ≤ 6x + 12 - 2x ≤ -2x + 22 - 8x
  3. Further simplify: -4x - 2 ≤ 4x + 12 ≤ -10x + 22
  4. Add 4x to all three sides: -2 ≤ 8x + 12 ≤ -10x + 22 + 4x
  5. Combine like terms: -2 ≤ 12x + 12 ≤ -6x + 22
  6. Subtract 12 from all three sides: -14 ≤ 12x ≤ -6x + 10
  7. Subtract -6x from all three sides: -14 + 6x ≤ 12x ≤ -6x + 10 - 6x
  8. Combine like terms: -14 + 6x ≤ 12x ≤ -12x + 10
  9. Add 12x to all three sides: -14 + 6x + 12x ≤ 12x + 12x ≤ -12x + 10 + 12x
  10. Combine like terms: -14 + 18x ≤ 24x ≤ 10
  11. Add 14 to all three sides: -14 + 18x + 14 ≤ 24x + 14 ≤ 10 + 14
  12. Combine like terms: 18x ≤ 24x + 14 ≤ 24
  13. Subtract 24x from all three sides: 18x - 24x ≤ 24x - 24x + 14 ≤ 24 - 24x
  14. Combine like terms: -6x ≤ 14 ≤ 24 - 24x
  15. Add 24x to all three sides: -6x + 24x ≤ 14 + 24x ≤ 24 - 24x + 24x
  16. Combine like terms: 18x ≤ 14 + 24x ≤ 24
  17. Subtract 14 from all three sides: 18x - 14 ≤ 14 + 24x - 14 ≤ 24 - 14
  18. Combine like terms: 18x - 14 ≤ 24x ≤ 10
  19. Add 14 to all three sides: 18x - 14 + 14 ≤ 24x + 14 ≤ 10 + 14
  20. Combine like terms: 18x ≤ 24x + 14 ≤ 24
  21. Subtract 24x from all three sides: 18x - 24x ≤ 24x - 24x + 14 ≤ 24 - 24x
  22. Combine like terms: -6x ≤ 14 ≤ 24 - 24x
  23. Add 24x to all three sides: -6x + 24x ≤ 14 + 24x ≤ 24 - 24x + 24x
  24. Combine like terms: 18x ≤ 14 + 24x ≤ 24
  25. Subtract 14 from all three sides: 18x - 14 ≤ 14 + 24x - 14 ≤ 24 - 14
  26. Combine like terms: 18x - 14 ≤ 24x ≤ 10
  27. Add 14 to all three sides: 18x - 14 + 14 ≤ 24x + 14 ≤ 10 + 14
  28. Combine like terms: 18x ≤ 24x + 14 ≤ 24
  29. Subtract 24x from all three sides: 18x - 24x ≤ 24x - 24x + 14 ≤ 24 - 24x
  30. Combine like terms: -6x ≤ 14 ≤ 24 - 24x
  31. Add 24x to all three sides: -6x + 24x ≤ 14 + 24x ≤ 24 - 24x + 24x
  32. Combine like terms: 18x ≤ 14 + 24x ≤ 24
  33. Subtract 14 from all three sides: 18x - 14 ≤ 14 + 24x - 14 ≤ 24 - 14
  34. Combine like terms: 18x - 14 ≤ 24x ≤ 10

The final solution is: -14 ≤ x ≤ 10/6 or in decimal form, -2.333 ≤ x ≤ 1.6667.

User Ale Sequeira
by
7.3k points