Carina is 5 year older than Marnie. Three years ago, she was twice as old as Marnie. how old are they now?
Marnie is 2 years old and Carina is 7 years old.
To solve our problem, let's write our information as equations. Carina is 5 years older than Marnie. Let Carnie be
After this, we can substitute
Next, let's put