So one third means you mutilply by 3 so 3x5 is 15 model cars
y = 5/2x + 5 would be your equation
Click on the second choice, the 3x one
First we need to calculate how many years her brother has when she is 18. As text says he is:
18/3 = 6 years old
Now when she gains another 18 years (36-18=18) he will also gain those 18 years
When she is 36 he will have 6+18=24 years old
Answer is 24.
