Question

given ( m parallel n ), find the value of ( x ).

Explanation:

Step1: Use the property of adjacent angles

Adjacent angles on a straight line sum to \(180^{\circ}\). So, \(x + 111=180\).

Step2: Solve for \(x\)

Subtract \(111\) from both sides: \(x=180 - 111\).

Answer:

\(69\)