42=2q

Solution for 42=2q equation:

Simplifying
42 = 2q

Solving
42 = 2q

Solving for variable 'q'.

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

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

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

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

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

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

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

Simplifying
q = 21