评论
打印
答案：B
解析：
The mathematical expression given in the question is (8x) + (2x)-5, which is equivalent to (10x)-5. The expression (10x)-5 can be factored as 5((2x)-1). For every positive integer x, 5((2x)-1) must be a multiple of 5. If x = 1, then 5((2x)-1) = 5, which is not an integer multiple of 2, 8, 10, or 15. Therefore, the correct answer is 5.
