Find x in the following expressions:

1. (111)10 = (x)3;

X^3 = 10(111).

X^3 = 1110
Take cube root of both sides:
X = 10.354.

OR
Take Log of both sides:
3*LogX = Log1110
LogX = Log1110/3 = 1.01510766.
X = 10^(1.01510766) = 10.354.