4.0=u

Solution for 4.0=u equation:

Simplifying
4.0 = u

Solving
4.0 = u

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-1u' to each side of the equation.
4.0 + -1u = u + -1u

Combine like terms: u + -1u = 0
4.0 + -1u = 0

Add '-4.0' to each side of the equation.
4.0 + -4.0 + -1u = 0 + -4.0

Combine like terms: 4.0 + -4.0 = 0.0
0.0 + -1u = 0 + -4.0
-1u = 0 + -4.0

Combine like terms: 0 + -4.0 = -4
-1u = -4

Divide each side by '-1'.
u = 4

Simplifying
u = 4