Answer:
20.28
Please look at the drawing
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LINES AND ANGLES
After observing we get as ..Going horizontal manner we get
1) Alternate Exterior Angles
2) None of these
3) Corresponding Angles
4)Alternate interior Angles
5) Corresponding Angles
The answer is c
It is easier quicker to apply
X+2y
Plug in the variables
4+2(7)
4+14
x+2y=18