-26
3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
15 + 13 + 11 = 39
25 + 15 + 21 + 10 + 11 = 82
9 plus 11 (20) plus 15 (35) plus 18 is equal to 53
15
4 + (-15) = 4 - 15 = -11
10+9+15+8+4+6+11=63
The answer is 142. Just add all of the numbers together and then you get the answer. Always check your work when you are done. You can use a calculator to do this.
13 - 15 - 1 + 11 = 8
If: y+15 = 11 Then: y = -4
162
11