ANSWER:
The solution for this problem is displayed in the attached image. I have made the numbers ( answers ) which I inputed into the table bold and red.
The method I used to solve this problem was trial and error.
To check the answers, you must simply input the numbers with each of the symbols into the equations. If the left-hand side of the equation is equivalent to the right-hand side of the equation, the equation is correct.
COLUMNS -
Column No. 1:
5 + 4 - 7 = 2
9 - 7 = 2
2 = 2
Therefore, this equation is correct.
Column No. 2:
9 ÷ 1 + 6 = 15
9 + 6 = 15
15 = 15
Therefore, this equation is correct.
Column No. 3:
3 × 8 ÷ 2 = 12
24 ÷ 2 = 12
12 = 12
Therefore, this equation is correct.
ROWS -
Row No. 1:
5 × 9 ÷ 3 = 15
45 ÷ 3 = 15
15 = 15
Therefore, this equation is correct.
Row No. 2:
4 - 1 × 8 = 24
3 × 8 = 24
24 = 24
Therefore, this equation is correct.
Row No. 3:
7 - 6 + 2 = 3
1 + 2 = 3
3 = 3
Therefore, this equation is correct.
Since all equations in this problem are correct, this means that all the numbers ( answers ) must also be correct.