Select all equations where x= 3 is a solution

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.