Question

Given m|n, find the value of x. + (9X+7)° (10X-10)

Answer 1

From the figure we see that the angles shown are alternate interior angles, then they are equal, hence

`9x+7=10x-10`

Solving for x, we have

`\begin{gathered} 9x+7=10x-10 \\ 7+10=10x-9x \\ 17=x \end{gathered}`

Then x=17 degrees.