6+r=15-2r

Solution for 6+r=15-2r equation:

Simplifying
6 + r = 15 + -2r

Solving
6 + r = 15 + -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
6 + r + 2r = 15 + -2r + 2r

Combine like terms: r + 2r = 3r
6 + 3r = 15 + -2r + 2r

Combine like terms: -2r + 2r = 0
6 + 3r = 15 + 0
6 + 3r = 15

Add '-6' to each side of the equation.
6 + -6 + 3r = 15 + -6

Combine like terms: 6 + -6 = 0
0 + 3r = 15 + -6
3r = 15 + -6

Combine like terms: 15 + -6 = 9
3r = 9

Divide each side by '3'.
r = 3

Simplifying
r = 3