-6(-1-r)=13-r

Solution for -6(-1-r)=13-r equation:

Simplifying
-6(-1 + -1r) = 13 + -1r
(-1 * -6 + -1r * -6) = 13 + -1r
(6 + 6r) = 13 + -1r

Solving
6 + 6r = 13 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
6 + 6r + r = 13 + -1r + r

Combine like terms: 6r + r = 7r
6 + 7r = 13 + -1r + r

Combine like terms: -1r + r = 0
6 + 7r = 13 + 0
6 + 7r = 13

Add '-6' to each side of the equation.
6 + -6 + 7r = 13 + -6

Combine like terms: 6 + -6 = 0
0 + 7r = 13 + -6
7r = 13 + -6

Combine like terms: 13 + -6 = 7
7r = 7

Divide each side by '7'.
r = 1

Simplifying
r = 1