-x+42=20x

Solution for -x+42=20x equation:

Simplifying
-1x + 42 = 20x

Reorder the terms:
42 + -1x = 20x

Solving
42 + -1x = 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
42 + -1x + -20x = 20x + -20x

Combine like terms: -1x + -20x = -21x
42 + -21x = 20x + -20x

Combine like terms: 20x + -20x = 0
42 + -21x = 0

Add '-42' to each side of the equation.
42 + -42 + -21x = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -21x = 0 + -42
-21x = 0 + -42

Combine like terms: 0 + -42 = -42
-21x = -42

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

Simplifying
x = 2