Answer:
see the procedure
Step-by-step explanation:
The picture of the question in the attached figure
we know that
[tex]m\angle QVR=m\angle TVU[/tex] ----> by vertical angles
substitute the given values
[tex]49^o=(3x+4)^o[/tex]
solve for x
subtract 4 both sides
[tex]3x=49-4\\3x=45[/tex]
divide by 3 both sides
[tex]x=45/3\\x=15[/tex]
