Question

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

Answer 1

(B) x = 40

Step-by-step explanation:

4x + 20 = 180

4x = 160

x = 40

Answer 2

Answer:

B. 40

Step-by-step explanation:

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

SUPPLEMENTARY ANGLES: 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.