-(r+s)-(2r+2s)=

Solution for -(r+s)-(2r+2s)= equation:

Simplifying
-1(r + s) + -1(2r + 2s) = 0
(r * -1 + s * -1) + -1(2r + 2s) = 0
(-1r + -1s) + -1(2r + 2s) = 0
-1r + -1s + (2r * -1 + 2s * -1) = 0
-1r + -1s + (-2r + -2s) = 0

Reorder the terms:
-1r + -2r + -1s + -2s = 0

Combine like terms: -1r + -2r = -3r
-3r + -1s + -2s = 0

Combine like terms: -1s + -2s = -3s
-3r + -3s = 0

Solving
-3r + -3s = 0

Solving for variable 'r'.

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

Add '3s' to each side of the equation.
-3r + -3s + 3s = 0 + 3s

Combine like terms: -3s + 3s = 0
-3r + 0 = 0 + 3s
-3r = 0 + 3s
Remove the zero:
-3r = 3s

Divide each side by '-3'.
r = -1s

Simplifying
r = -1s