4(3r+5)=

Solution for 4(3r+5)= equation:

Simplifying
4(3r + 5) = 0

Reorder the terms:
4(5 + 3r) = 0
(5 * 4 + 3r * 4) = 0
(20 + 12r) = 0

Solving
20 + 12r = 0

Solving for variable 'r'.

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

Add '-20' to each side of the equation.
20 + -20 + 12r = 0 + -20

Combine like terms: 20 + -20 = 0
0 + 12r = 0 + -20
12r = 0 + -20

Combine like terms: 0 + -20 = -20
12r = -20

Divide each side by '12'.
r = -1.666666667

Simplifying
r = -1.666666667