Answer:
y = x + 9 ( in years)
Step-by-step explanation:
Given that Patrick is x years old and his brother is 9 years older than he is. Then;
His brother's age will be
= x + 9
If his brother is y years old then
y = x + 9
Since y is the subject, y has been expressed in terms of x. Where y is the age of Patrick's brother and x is Patrick's age.
