42=12r-6

Solution for 42=12r-6 equation:

Simplifying
42 = 12r + -6

Reorder the terms:
42 = -6 + 12r

Solving
42 = -6 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
42 + -12r = -6 + 12r + -12r

Combine like terms: 12r + -12r = 0
42 + -12r = -6 + 0
42 + -12r = -6

Add '-42' to each side of the equation.
42 + -42 + -12r = -6 + -42

Combine like terms: 42 + -42 = 0
0 + -12r = -6 + -42
-12r = -6 + -42

Combine like terms: -6 + -42 = -48
-12r = -48

Divide each side by '-12'.
r = 4

Simplifying
r = 4