Find the value of x. The diagram is not to scale. Given:

——RS=—- ST,m<RST=7x-54,m<

STU=8x
A. 14
B. 152
C.16
D.19

It looks like there is some missing information in the question. It says "m< STU=", but there is no angle measure given. Please provide the missing information in order to solve the problem.