Answer:
number 3
Step-by-step explanation:
angleNGL=~angleHGF
I'm guessing the answer is B? I tried to isolate r and I got that result. Sorry if it's wrong!
-8+4x=-20x-25+7x
4x+20x-7x=-25+8
17x=-17 /17
x=-1
It is EXACTLY equal to 13, whereas the second equation equals 
I am joyous to assist you anytime.
Answer:
The measure of the missing angle is 90°
Step-by-step explanation:
∵ This figure is a quadrilateral
∴ the sum of measures of its angles = 360°
∴ m∠x = 360 - 107 - 72 - 91 = 90°