42=8v-v

Solution for 42=8v-v equation:

Simplifying
42 = 8v + -1v

Combine like terms: 8v + -1v = 7v
42 = 7v

Solving
42 = 7v

Solving for variable 'v'.

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

Add '-7v' to each side of the equation.
42 + -7v = 7v + -7v

Combine like terms: 7v + -7v = 0
42 + -7v = 0

Add '-42' to each side of the equation.
42 + -42 + -7v = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -7v = 0 + -42
-7v = 0 + -42

Combine like terms: 0 + -42 = -42
-7v = -42

Divide each side by '-7'.
v = 6

Simplifying
v = 6