Let x = chloe's age.
Let y = Leonel's age.
To help solve this, construct a system of equations.
x = 5 + y.
8y = 3x.
We can solve this by substitution. Substitute 5 + y for x in the second equation.
8y = 3(5 + y). Distribute the 3.
8y = 15 + 3y. Subtract 3y from both sides.
5y = 15. Divide each side by 5.
y = 3. Plug this into one of our original equations.
x = 5 + 3. Add your numbers together.
x = 8
Chloe is 8 years old