How do documents need to differ depending on who the readers will be?

Which sentence best contrasts two things? a. air travel, like bus travel, is a fun way to get from one place to another. b. air travel is a fun and relatively easy way to get from place to place. c. both bus travel and air travel require substantial planning. d. air travel is much more expensive than bus travel.

Me with english (easy for you) 50 points

What is the value of x in the equation? 43 7 x − 31 2 = 12 a) 32 5 b) 31 2 c) 33 4 d) 36 7