42=6pir^2

Solution for 42=6pir^2 equation:

Simplifying
42 = 6pir2

Solving
42 = 6ipr2

Solving for variable 'i'.

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

Add '-6ipr2' to each side of the equation.
42 + -6ipr2 = 6ipr2 + -6ipr2

Combine like terms: 6ipr2 + -6ipr2 = 0
42 + -6ipr2 = 0

Add '-42' to each side of the equation.
42 + -42 + -6ipr2 = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -6ipr2 = 0 + -42
-6ipr2 = 0 + -42

Combine like terms: 0 + -42 = -42
-6ipr2 = -42

Divide each side by '-6pr2'.
i = 7p-1r-2

Simplifying
i = 7p-1r-2