2n-9=(r+6)

Solution for 2n-9=(r+6) equation:

Simplifying
2n + -9 = (r + 6)

Reorder the terms:
-9 + 2n = (r + 6)

Reorder the terms:
-9 + 2n = (6 + r)

Remove parenthesis around (6 + r)
-9 + 2n = 6 + r

Solving
-9 + 2n = 6 + r

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 + 2n = 6 + 9 + r

Combine like terms: -9 + 9 = 0
0 + 2n = 6 + 9 + r
2n = 6 + 9 + r

Combine like terms: 6 + 9 = 15
2n = 15 + r

Divide each side by '2'.
n = 7.5 + 0.5r

Simplifying
n = 7.5 + 0.5r