-3(2r+5)-12r+(-12)=

Solution for -3(2r+5)-12r+(-12)= equation:

Simplifying
-3(2r + 5) + -12r + (-12) = 0

Reorder the terms:
-3(5 + 2r) + -12r + (-12) = 0
(5 * -3 + 2r * -3) + -12r + (-12) = 0
(-15 + -6r) + -12r + (-12) = 0
-15 + -6r + -12r + -12 = 0

Reorder the terms:
-15 + -12 + -6r + -12r = 0

Combine like terms: -15 + -12 = -27
-27 + -6r + -12r = 0

Combine like terms: -6r + -12r = -18r
-27 + -18r = 0

Solving
-27 + -18r = 0

Solving for variable 'r'.

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

Add '27' to each side of the equation.
-27 + 27 + -18r = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -18r = 0 + 27
-18r = 0 + 27

Combine like terms: 0 + 27 = 27
-18r = 27

Divide each side by '-18'.
r = -1.5

Simplifying
r = -1.5