Moscow, the capital city of Russia, is at 37.62 degrees longitude and 55.75 degrees latitude. Brasilia, the capital city of Brazil, is at -47.87 degrees longitude and -15.8 degrees latitude. Complete the following steps to learn more about the distance between the two cities.

Part A
Write an expression to find the distance (in degrees) between the longitude lines of Moscow and Brasilia. Use absolute value in your expression.