-What is the sum of - 1 / 2 and 1 / 6? 1 + (- 2) + 3 + (- 4) + 5 + (- 6) +. + 99 + (- 100)= -1 / 60 ÷ (1 / 3 + 1 / 4-1 / 5) = (0.123) to the 5th power * the 4th power of 8=

-What is the sum of - 1 / 2 and 1 / 6? 1 + (- 2) + 3 + (- 4) + 5 + (- 6) +. + 99 + (- 100)= -1 / 60 ÷ (1 / 3 + 1 / 4-1 / 5) = (0.123) to the 5th power * the 4th power of 8=

First, arrange 1 ~ 16 into 4 rows and 4 columns
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
In addition to the 8 invariant positions of the diagonal, all the others are reversed
1 15 14 4
12 6 7 9
8 10 11 5
13 3 2 16 ask Altman

According to "the difference between 7 times and 1 of a is 2 times more than the sum of 1 of a and 2 times more than the sum of 1", the solution of the equation is listed and a is obtained=

7a-1=3(2a+1)
7a-1=6a+3
a=4

The difference between a and - 3 is less than 2 times of A. the three equations are shown in the following table

a=6 （a+3)=2a-3