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5 votes
Find the value of x.


geometry

Find the value of x. geometry-example-1

2 Answers

4 votes

Answer:

25.5

Explanation:

we're trying to isolate x to find out what it is!

first, the line equals 180 so we'll set that as the base equation

both angles added together should equal 180, so that's how i got this equation to start with

180 = 129 + (2x+9) from here you have to subtract 129 on both sides

51 = 2x + 9 subtract 9 from both sides

51 = 2x next divide both sides by 2

25.5 = x

User Vertazzar
by
8.4k points
0 votes

Answer:

111

Explanation:

129+2x+9=360(angle at a point)

222+2x=360

2x=360-222

2x=100

x=50

User Will Curran
by
8.1k points

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