42=2y

Solution for 42=2y equation:

Simplifying
42 = 2y

Solving
42 = 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
42 + -2y = 2y + -2y

Combine like terms: 2y + -2y = 0
42 + -2y = 0

Add '-42' to each side of the equation.
42 + -42 + -2y = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -2y = 0 + -42
-2y = 0 + -42

Combine like terms: 0 + -42 = -42
-2y = -42

Divide each side by '-2'.
y = 21

Simplifying
y = 21