Question

answer this with explanation....​

Answer 1

$(8+7)+(9-2)-4=18$

$(5+7)+(8-3)-4=13$

$(1+2)+(6-1)-4=4$

Then,

$(6+2)+(3-1)-4=6$

The answer is 6.

Answer 2

87+92=18

(8+7)+(9-2)-4=18

57+83=13

(5+7)+(8-3)-4=13

12+61

(1+2)+(6-1)-4=4

62+13=?

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