Solve for u.
6u + 14 = 7u + 2u - 13

u = 13.5

Step-by-step explanation:

6u + 14 = 7u + 2u - 13

14 = 6u + 2u - 6u - 13

14 = 2u - 13

27 = 2u

u = 13.5

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents