12r+6=87+3r

Solution for 12r+6=87+3r equation:

Simplifying
12r + 6 = 87 + 3r

Reorder the terms:
6 + 12r = 87 + 3r

Solving
6 + 12r = 87 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
6 + 12r + -3r = 87 + 3r + -3r

Combine like terms: 12r + -3r = 9r
6 + 9r = 87 + 3r + -3r

Combine like terms: 3r + -3r = 0
6 + 9r = 87 + 0
6 + 9r = 87

Add '-6' to each side of the equation.
6 + -6 + 9r = 87 + -6

Combine like terms: 6 + -6 = 0
0 + 9r = 87 + -6
9r = 87 + -6

Combine like terms: 87 + -6 = 81
9r = 81

Divide each side by '9'.
r = 9

Simplifying
r = 9