Question

10.6-a , x ,6+a are in Arithmetic Progression then find the value of x' ?​

Answer 1

$x - (6 - a) = d \\ 6 + a - x = d \\ \\ x - 6 + a = 6 + a - x \\ \\ x + x = 6 + 6 + a - a \\ \\ 2x = 12 \\ \\ x = \frac{12}{2} \\ \\ x = 6$