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jeyben [28]
3 years ago
8

1)

Mathematics
2 answers:
borishaifa [10]3 years ago
3 0
Multiply everything in the parenthesis by -4.

-12 + 8x + 2x = 2x - 8

Combine like terms.

-12 + 10x = 2x - 8

Subtract 10x from both sides.

-12 = -8x - 8

Add 8 to both sides.

-4 = -8x

Divide both sides by -8.

x = 0.5

Hope this helps!
nasty-shy [4]3 years ago
3 0
The  answer should be x=1
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Answer:

∠ 4 = 140°

Step-by-step explanation:

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∠ 4 is an exterior angle of the triangle, then

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