Answer:
37 years, 1898
Step-by-step explanation:
One championship was in 1937 and the other in 1976. For knowing the year between both championship we just need to see the difference brtween both years, which mathematically is just a subtract:
1976 - 1937 = 39 years
So, there are 39 years between those championship.
If there was another championship 39 years before 1937, we can use the same procedure. Let X be this year, 39 years previous 1937:
1937 - X = 39
If we sum X in both sides:
1937 - X + X = 39 + X
1937 = 39 + X
Now, subtract 39 in both sides:
1937 - 39 = 39 + X - 39
1898 = X
So, the previous championship to 1937 was in 1898