Question

For what value of x, shall l || m?
(a) x = 50
(b) x = 70
(c) x = 60
(d) x = 45

Answer 1

(a) x = 50

for l || m we have,

$$\begin{gathered} 2x-30=x+20\left[\text{Corresponding Angles}\right] \\ \therefore x=50 \end{gathered}$$