If line s and line t are parallel lines cut by transversal line r, what is the value of x?

x = 18

x cannot be determined from the information given

x = 33

x = 12

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.