42=3.5s

Solution for 42=3.5s equation:

Simplifying
42 = 3.5s

Solving
42 = 3.5s

Solving for variable 's'.

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

Add '-3.5s' to each side of the equation.
42 + -3.5s = 3.5s + -3.5s

Combine like terms: 3.5s + -3.5s = 0.0
42 + -3.5s = 0.0

Add '-42' to each side of the equation.
42 + -42 + -3.5s = 0.0 + -42

Combine like terms: 42 + -42 = 0
0 + -3.5s = 0.0 + -42
-3.5s = 0.0 + -42

Combine like terms: 0.0 + -42 = -42
-3.5s = -42

Divide each side by '-3.5'.
s = 12

Simplifying
s = 12