B. ) Unless you're missing some data.
The dryer costs x.
The washer costs $93 more than the dryer, so it costs x+93.
The washer and the dryer cost $793 altogether.

The cost of the dryer is $350.
Step-by-step explanation:
Given
5x + 2x + 2 = 9x + 4
9x - 5x - 2x = 2 - 4
9x - 7x = - 2
2x = - 2
x = - 2 / 2
Therefore x = -1.
I couldn’t see the whole picture so I’m not sure if I could really help I’m sorry maybe next time