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riadik2000 [5.3K]
3 years ago
15

Find the value of x, please help

Mathematics
2 answers:
kifflom [539]3 years ago
6 0

Answer:

<h2>x = 90 (verified answer) ✅</h2>

Step-by-step explanation:

There are 360° of measure in a quadrilateral. By the definition of a parallelogram, we know that the angle opposite the labeled angle will have the same measure as that labeled angle.

So, 12x + 12x + 8x + 8x = 360

Simplifying all the x's gives us:

40x = 360

Divide by 40

x = 90

Now, we check this

40 (90) = 360

360 = 360 ✅

Sergeu [11.5K]3 years ago
5 0
12x and 8x form a linear pair, so the equation would be- 12x+8x=180
Then, combine like terms- 20x = 180.
Lastly, divide by 20 on both sides.
x=9
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I got 320 but what does the 121 mean?

Step-by-step explanation:

<u><em>PEMDAS</em></u>

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3 years ago
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