So, Anna has a markers, Ben has b markers and Cindy has c markers. We know that a+b+c = m. And we know also that a = 2b. ( twice as many markers as ben has) (Remember b is the number of Ben markers.) The equation becomes: 2b+b+c=m. Solving for c: [tex]c=m-3b[/tex] Cindy has (m-3b) markers.
