Answer:
The greatest common factor of 60 and 15 is 15. Therefore, we can use the distributive property with 15 located in front of the parentheses as follows:
60 + 15 = 15 x 4 + 15 x 1
= 15(4 + 1)
= 15 x 5
= 75
Therefore, 60 + 15 = 75 using the distributive property with the greatest common factor located in front of the parentheses.