6=15u-9u

Solution for 6=15u-9u equation:

Simplifying
6 = 15u + -9u

Combine like terms: 15u + -9u = 6u
6 = 6u

Solving
6 = 6u

Solving for variable 'u'.

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

Add '-6u' to each side of the equation.
6 + -6u = 6u + -6u

Combine like terms: 6u + -6u = 0
6 + -6u = 0

Add '-6' to each side of the equation.
6 + -6 + -6u = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -6u = 0 + -6
-6u = 0 + -6

Combine like terms: 0 + -6 = -6
-6u = -6

Divide each side by '-6'.
u = 1

Simplifying
u = 1