I believe it b I am sorry if iam wrong
Answer:
(D) 
Step-by-step explanation:

F(x) = | 4x - 1 | .....when f(x) = 7
7 = | 4x - 1 |
4x - 1 = 7 -(4x - 1) = 7
4x = 7 + 1 -4x + 1 = 7
4x = 8 -4x = 7 - 1
x = 8/4 -4x = 6
x = 2 x = -6/4
x = - 3/2
solutions are x = -3/2, 2
Answer:
D=6
Step-by-step explanation:
So, first, we can multiply 7x2=14. Then, it would be D+14=20. 20-14=6, so D=6.