Question

Find x and input that value in the text box. (The lines that appear to be parallel are indeed parallel.) (4x12) 120° x = ?

Answer 1

We can see that the angle (4x-12) and 120 are supplementary. That is, they add 180 degrees.

We can conclude that because the supplementary angle for (4x-12) is similar to the angle of 120 degrees.

Then, we can work from this equality:

`\begin{gathered} (4x-12)+120=180 \\ 4x-12=180-120=60 \\ 4x=60+12 \\ 4x=72 \\ x=(72)/(4) \\ x=18 \end{gathered}`

The value of x is 18 degrees.