Ethan had 19 cookies. After giving away 1 cookie to his neighbor, he had two times as many cookies as Louisa. How many cookies did Louisa have?

Answer 1

19 -1 = 18

18 = 2L

Solve for L

Answer 2

After giving away 1 cookie to his neighbor, he had 19 - 1 = 18 cookies

He had two times as many cookies as Louisa.

18 = 2 ∙ Louisa´s cookies

Louisa have 18 / 2 = 9 cookies