Make sure it's fully reduced.

2 - x = 5/8

Isolate the x. Note the equal sign. What you do to one side, you do to the other.

First, subtract 2 from both sides

2 (-2) - x = (5/8) - 2

-x = 5/8 - 2

Make sure they have the same denominator. Remember that what you multiply to the denominator, you multiply the numerator:

-x = 5/8 - 16/8

-x = - 11/8

Isolate the x. Divide - 1 from both sides

(-x) / -1 = (-11/8) / -1

x = 11/8

11/8 is your answer for x

~Rise Above the Ordinary