42=-6r

Solution for 42=-6r equation:

Simplifying
42 = -6r

Solving
42 = -6r

Solving for variable 'r'.

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

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

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

Add '-42' to each side of the equation.
42 + -42 + 6r = 0 + -42

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

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

Divide each side by '6'.
r = -7

Simplifying
r = -7