Answer :
n = number
...............................
n - 121 = - 164
3
n = - 164 + 121
3
n = - 43
3
Cross multiply
n = - 43 * 3
n = - 129
S = - 129
...............................
n - 121 = - 164
3
n = - 164 + 121
3
n = - 43
3
Cross multiply
n = - 43 * 3
n = - 129
S = - 129
