9=r-3+6

Solution for 9=r-3+6 equation:

Simplifying
9 = r + -3 + 6

Reorder the terms:
9 = -3 + 6 + r

Combine like terms: -3 + 6 = 3
9 = 3 + r

Solving
9 = 3 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
9 + -1r = 3 + r + -1r

Combine like terms: r + -1r = 0
9 + -1r = 3 + 0
9 + -1r = 3

Add '-9' to each side of the equation.
9 + -9 + -1r = 3 + -9

Combine like terms: 9 + -9 = 0
0 + -1r = 3 + -9
-1r = 3 + -9

Combine like terms: 3 + -9 = -6
-1r = -6

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

Simplifying
r = 6