I need aid here please.

Question

Find the sum: 

Answer:_______

Answer 1

So, you have |-77 - (-5)| = 72, right? Since your numbers are 6 apart, that's 72/6 = 12 total numbers from -5 to -77.

Now, -5 + -77 = -82. Hey, -11 + -71 = -82, etc. Since you have 12 numbers in pairs (6 total) that add up to -82...

-82(6) = -492