Even the census-taker’s most heroic act—a successful resolution of the book’s central mystery—goes unexplained, except by implication. In this sentence, implication means: a. inference

b. ideology

c. impairment

d. impropriety

gay mainly is used with men and homosexual can be used with men and women

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4