42=-1.4v

Solution for 42=-1.4v equation:

Simplifying
42 = -1.4v

Solving
42 = -1.4v

Solving for variable 'v'.

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

Add '1.4v' to each side of the equation.
42 + 1.4v = -1.4v + 1.4v

Combine like terms: -1.4v + 1.4v = 0.0
42 + 1.4v = 0.0

Add '-42' to each side of the equation.
42 + -42 + 1.4v = 0.0 + -42

Combine like terms: 42 + -42 = 0
0 + 1.4v = 0.0 + -42
1.4v = 0.0 + -42

Combine like terms: 0.0 + -42 = -42
1.4v = -42

Divide each side by '1.4'.
v = -30

Simplifying
v = -30