Question

If arithmetic means (x) of 7,(x+2),10 and (x-3) is 9. Calculate the value of x.​

Answer 1

$\frac{ 7 + (x + 2) + 10 + (x - 3)}{4} = 9$

$\frac{16 + 2x}{4} = 9$

16 + 2x = 36

2x = 20

$x = \frac{20}{2}$

x = 10