4(3-r)+r=(3+c)

Solution for 4(3-r)+r=(3+c) equation:

Simplifying
4(3 + -1r) + r = (3 + c)
(3 * 4 + -1r * 4) + r = (3 + c)
(12 + -4r) + r = (3 + c)

Combine like terms: -4r + r = -3r
12 + -3r = (3 + c)

Remove parenthesis around (3 + c)
12 + -3r = 3 + c

Solving
12 + -3r = 3 + c

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + -3r = 3 + -12 + c

Combine like terms: 12 + -12 = 0
0 + -3r = 3 + -12 + c
-3r = 3 + -12 + c

Combine like terms: 3 + -12 = -9
-3r = -9 + c

Divide each side by '-3'.
r = 3 + -0.3333333333c

Simplifying
r = 3 + -0.3333333333c