-3(5r+5)+3(r-8)=

Solution for -3(5r+5)+3(r-8)= equation:

Simplifying
-3(5r + 5) + 3(r + -8) = 0

Reorder the terms:
-3(5 + 5r) + 3(r + -8) = 0
(5 * -3 + 5r * -3) + 3(r + -8) = 0
(-15 + -15r) + 3(r + -8) = 0

Reorder the terms:
-15 + -15r + 3(-8 + r) = 0
-15 + -15r + (-8 * 3 + r * 3) = 0
-15 + -15r + (-24 + 3r) = 0

Reorder the terms:
-15 + -24 + -15r + 3r = 0

Combine like terms: -15 + -24 = -39
-39 + -15r + 3r = 0

Combine like terms: -15r + 3r = -12r
-39 + -12r = 0

Solving
-39 + -12r = 0

Solving for variable 'r'.

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

Add '39' to each side of the equation.
-39 + 39 + -12r = 0 + 39

Combine like terms: -39 + 39 = 0
0 + -12r = 0 + 39
-12r = 0 + 39

Combine like terms: 0 + 39 = 39
-12r = 39

Divide each side by '-12'.
r = -3.25

Simplifying
r = -3.25