Question

what is the value of j?

Explanation:

Step1: Note angle - sum property

The sum of angles forming a straight - line is 180°.

Step2: Set up equation

Let the unknown angle be \(j\). We have \(50^{\circ}+j = 180^{\circ}\).

Step3: Solve for \(j\)

Subtract 50° from both sides of the equation: \(j=180^{\circ}-50^{\circ}\).

Answer:

\(130^{\circ}\)