Question 522446
try this


"The mean of 5 numbers, two of which are equal, is 8" ___ a + b + c + d + d = 5 * 8


"When the two equal numbers are removed, the mean of the remaining three numbers is also 8" ___ a + b + c = 3 * 8


subtracting the equations ___ d + d = 2 * 8