book Maths Puzzle Numerical Ability

Solve the following inequality--
2x + 8<= -16 + 8x
If the inequality has no solution or is true for all real numbers, say so

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book Other Question

How do you know whether a word problem is a combination or permutation? Find the three concecutive even integers for which 3 times the largest is twice the sum of the two smallest integers. This question has me stumped, would someone help me figure it out?