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myrzilka [38]
3 years ago
9

Find the value of x. Give reasons to justify your answer.

Mathematics
1 answer:
pychu [463]3 years ago
7 0
6x+4x=180°
10x=180°
180/10x
x=18
6x and 4x are alternate interior angles and they can be added to each other to create a product of 180.
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Read 2 more answers
Find the solution of this system of equations.
vagabundo [1.1K]
I'm going to use the substitution method.

4x + 4y = -16
-8x - 6y = -20

4x + 4y = -16
- 4x - 4x
--------------------------
4y = -4x - 16
------ ------ ------
4 4 4

y = -x - 4

-8x - 6(-x - 4) = -20
-8x + 6x + 24 = -20
-2x + 24 = -20
- 24 - 24
----------------------------
-2x = 44
------- -------
2 2

x = 22


4(22) + 4y = -16
88 + 4y = -16
- 88 - 88
------------------------
4y = -104
------ ---------
4 4

y = -26



The answer is (22, -26).



4 0
3 years ago
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