2n+9(2n+1)=

Solution for 2n+9(2n+1)= equation:

Simplifying
2n + 9(2n + 1) = 0

Reorder the terms:
2n + 9(1 + 2n) = 0
2n + (1 * 9 + 2n * 9) = 0
2n + (9 + 18n) = 0

Reorder the terms:
9 + 2n + 18n = 0

Combine like terms: 2n + 18n = 20n
9 + 20n = 0

Solving
9 + 20n = 0

Solving for variable 'n'.

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

Add '-9' to each side of the equation.
9 + -9 + 20n = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 20n = 0 + -9
20n = 0 + -9

Combine like terms: 0 + -9 = -9
20n = -9

Divide each side by '20'.
n = -0.45

Simplifying
n = -0.45