Final answer:
It took seventy-two years between the first meeting in support of woman suffrage and the passage of the 19th Amendment.
Step-by-step explanation:
The first meeting in support of woman suffrage took place in 1848 at the women's rights convention in Seneca Falls, New York. However, it would take seventy-two years for the 19th Amendment, which granted most American women the right to vote, to be passed.
By 1919, thirty states and territories had approved women's suffrage in at least some elections, and two-thirds of the Senate approved a women's suffrage amendment on June 4, 1919. The amendment required ratification by at least three-fourths of the states, which was achieved when Tennessee became the thirty-sixth state to ratify the amendment in August 1920.
Overall, it took seventy-two years between the first meeting in support of woman suffrage and the passage of the 19th Amendment.