Question

My uncle is 7 years older than twice the age of my eldest sister. If my uncle is 43 years old, how old is my sister then?

Answer 1

Let \(u = \text{Uncle's age}\) and \(s = \text{Sister's age}\).\[u = 43 \]\[ u = 7 + 2s\]Therefore, we obtain the following:\[43 = 7 + 2s \]Solve the above equation.