2The birthday party of Tina's parents
Tina's parents are celebrating their birthday together this year.
Tina has a guilty conscience, because she has forgotten how old they are!
Her father makes a riddle out of it:
"If you double my age and add half your mother's age to her age, that adds up to 150 years."
That didn't help Tina much.
Her mother says:
"If you add three years to my age and subtract two years from your father's, we're the same age!"
Tina is currently going through systems of equations at school and now wants to try to use them to figure out her parents' ages.
She runs and gets a pencil and pad.
Now she can calculate how old her parents are.
Try it for yourself!
