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svetoff [14.1K]
3 years ago
5

Find the value of x.A.5B. 40C. 45 D. 20​

Mathematics
2 answers:
Alinara [238K]3 years ago
3 0

(B) x = 40

Step-by-step explanation:

4x + 20 = 180

4x = 160

x = 40

slega [8]3 years ago
3 0

Answer:

B. 40

Step-by-step explanation:

This is a straight angle; this means that 20 and 4x are supplementary angles.

<u>SUPPLEMENTARY ANGLES:</u> TWO ANGLES WITH A SUM OF 180°.

20 + 4x = 180.

First, subtract 20 from 180 and from 20.

20 - 20 = 0 (cancels itself out).

180 - 20 = 60.

Now we are left with 4x = 160.

Lastly, divide 160 from 4.

160/4 = 40.

Therefore, the value of x is 40.

Here's an attachment to make this process easier to understand.

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