-0.25+0.4=u

Solution for -0.25+0.4=u equation:

Simplifying
-0.25 + 0.4 = u

Combine like terms: -0.25 + 0.4 = 0.15
0.15 = u

Solving
0.15 = 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.
0.15 + -1u = u + -1u

Combine like terms: u + -1u = 0
0.15 + -1u = 0

Add '-0.15' to each side of the equation.
0.15 + -0.15 + -1u = 0 + -0.15

Combine like terms: 0.15 + -0.15 = 0.00
0.00 + -1u = 0 + -0.15
-1u = 0 + -0.15

Combine like terms: 0 + -0.15 = -0.15
-1u = -0.15

Divide each side by '-1'.
u = 0.15

Simplifying
u = 0.15