Can anyone helo me with this:))

Which expression is equivalent to 5r6141 2r+st6

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did