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telo118 [61]
3 years ago
13

Please help ASAP!! Will mark brainliest!!

Mathematics
2 answers:
Sergio [31]3 years ago
3 0

The answer is 10 because all the angles are equal making it a equilateral triangle.

Therefore, the sides are all equal to one another, 3x - 8 = 5x - 20.

You just solve for x and get 6. You then plug in 6 for x and evauluate the equation, getting 10.

ruslelena [56]3 years ago
3 0

Answer:

10

Step-by-step explanation:

This is an equilateral triangle ( because  all 3 angles have  the same measure)

So 3 all sides  are equal, therefore:-

5x - 20 = 3x - 8

2x = 12

x = 6

So DE =  3(6) - 8

= 10 units

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