Question

;Pls help you will get 20 points
. . . . . . . . . . . .. . .. . . .. . . .. . . .

Answer 1

a = 12

Explanation:

a+b+c+a+c+b+a+c = 12+a+a+b+b+c+c+c

=> 3a + 2b + 3c = 12 + 2a + 2b + 3c

=> 3a - 2a + 2b - 2b + 3c - 3c = 12

=> a = 12