What is the solution to the system of equation

Two parallel lines are crossed by a transversal.what is value of x

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events

Why is x= 4 a solution to the proportion 14/x 56/1 6