how did the missouri compromise affect massachusetts
The Missouri Compromise of 1820 admitted Missouri as a slave state,  and Maine as a free state, to keep the balance of slave/non-slave  states equal in Congress.It also est â¦ ablished the 36-30 line, and  said that slavery would not be allowed above that line except for  in Missouri.  So the Compromise set a bunch of rules about slavery, but the big  thing it did was it separated Maine from Massachusetts and allowed  it to become a free state. Missouri was allowed to become a slave  state.
The Missouri Compromise of 1820 admitted Missouri as a slave state,  and Maine as a free state, to keep the balance of slave/non-slave  states equal in Congress.It also est â¦ ablished the 36-30 line, and  said that slavery would not be allowed above that line except for  in Missouri.he Missouri Compromise created the 36th parallel in the United States, the Mason Dixon Line. The Mason Dixon line was an imaginary line that divided the North and South.