Question

For what value of x, shall l || m?
(a) x = 35
(b) x = 30
(c) x = 25
(d) x = 20

Answer 1

(c) x = 25

for l || m we have,

$$\begin{gathered} 4x+3x+5=180\left[\text{Angles on the same side of transversal line are supply mentry}\right] \\ \mathrm{or},7x=175 \\ \therefore x=25 \end{gathered}$$