The answer is 156. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.
8c + 24 + 23 = 71subtract 47 from each side, 8c = 24divide each side by 8, c = 3
45 + 8 - 23 + 2 = 32
11
(-15) + 23 = 8
23
23 + 8 = 31
8 plus 15 = 23
8c + 24 + 23 = 71subtract 47 from each side, 8c = 24divide each side by 8, c = 3
45 + 8 - 23 + 2 = 32
11
(-15) + 23 = 8
23
42
I think that each number is the previous one plus 8; 7+8=15 15+8=23 23+8=31 31+8=39 39+8=47
78 - without the aid of a calculator !
you just add eight and the answer is 5
6 + 4 + 12 + 18 + 72 + 1 + 2 + 3 + 8 + 9 + 24 + 47 = 206