Diketahui A = (-1 x-1 2 3), B = (x+2 6 -1 5), dan C = (4/5

Diketahui A = (-1 x-1 2 3), B = (x+2 6 -1 5), dan C = (4/5 -1/10 -3/5 1/5). Jika (A+B)^T = C^(-1), nilai x = ....