42=2(2w)

Solution for 42=2(2w) equation:

Simplifying
42 = 2(2w)

Remove parenthesis around (2w)
42 = 2 * 2w

Multiply 2 * 2
42 = 4w

Solving
42 = 4w

Solving for variable 'w'.

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

Add '-4w' to each side of the equation.
42 + -4w = 4w + -4w

Combine like terms: 4w + -4w = 0
42 + -4w = 0

Add '-42' to each side of the equation.
42 + -42 + -4w = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -4w = 0 + -42
-4w = 0 + -42

Combine like terms: 0 + -42 = -42
-4w = -42

Divide each side by '-4'.
w = 10.5

Simplifying
w = 10.5