13+26=3u

Solution for 13+26=3u equation:

Simplifying
13 + 26 = 3u

Combine like terms: 13 + 26 = 39
39 = 3u

Solving
39 = 3u

Solving for variable 'u'.

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

Add '-3u' to each side of the equation.
39 + -3u = 3u + -3u

Combine like terms: 3u + -3u = 0
39 + -3u = 0

Add '-39' to each side of the equation.
39 + -39 + -3u = 0 + -39

Combine like terms: 39 + -39 = 0
0 + -3u = 0 + -39
-3u = 0 + -39

Combine like terms: 0 + -39 = -39
-3u = -39

Divide each side by '-3'.
u = 13

Simplifying
u = 13