Question

A straight line is 180 degrees. Find the value of X.

Answer 1

Given a straight line angle = 180

So, the angles (9x-100) and (40-x) are supplementary angles

So,

`(9x-100)+(40-x)=180`

Solve for x:

`\begin{gathered} (9x-x)+(40-100)=180 \\ 8x-60=180 \\ 8x=180+60 \\ 8x=240 \\ x=(240)/(8)=30 \end{gathered}`

So, the answer will be x = 30