-(1+6r)-3(3+2r)=

Solution for -(1+6r)-3(3+2r)= equation:

Simplifying
-1(1 + 6r) + -3(3 + 2r) = 0
(1 * -1 + 6r * -1) + -3(3 + 2r) = 0
(-1 + -6r) + -3(3 + 2r) = 0
-1 + -6r + (3 * -3 + 2r * -3) = 0
-1 + -6r + (-9 + -6r) = 0

Reorder the terms:
-1 + -9 + -6r + -6r = 0

Combine like terms: -1 + -9 = -10
-10 + -6r + -6r = 0

Combine like terms: -6r + -6r = -12r
-10 + -12r = 0

Solving
-10 + -12r = 0

Solving for variable 'r'.

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

Add '10' to each side of the equation.
-10 + 10 + -12r = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -12r = 0 + 10
-12r = 0 + 10

Combine like terms: 0 + 10 = 10
-12r = 10

Divide each side by '-12'.
r = -0.8333333333

Simplifying
r = -0.8333333333