-9(6+u)-2u=-20

Solution for -9(6+u)-2u=-20 equation:

Simplifying
-9(6 + u) + -2u = -20
(6 * -9 + u * -9) + -2u = -20
(-54 + -9u) + -2u = -20

Combine like terms: -9u + -2u = -11u
-54 + -11u = -20

Solving
-54 + -11u = -20

Solving for variable 'u'.

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

Add '54' to each side of the equation.
-54 + 54 + -11u = -20 + 54

Combine like terms: -54 + 54 = 0
0 + -11u = -20 + 54
-11u = -20 + 54

Combine like terms: -20 + 54 = 34
-11u = 34

Divide each side by '-11'.
u = -3.090909091

Simplifying
u = -3.090909091