What’s the value of x

22 degrees

Step-by-step explanation:

To calculate the measure of the third angle, add the other two measure of the other angles together and subtract that from 180

127 + 31 = 158

180 - 158 = 22

the missing angle measure is 22 degrees

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18