Which value of x would make ASUV ATUW by HL?
pls help

In the HL theorem, the hypotenuse and one length of the two triangles are equivalent. In order to calculate the value of x, we equate the two values of the hypotenuse:
2x + 9 = 4x - 1
2x = 10
x = 5

With x = 5, the hypotenuse of SUV works out to be 19, and the hypotenuse of WUT also works out to be 19.

Cdoes not have two variables

I’m having a hard time understanding your question