42=x-.50(8)

Solution for 42=x-.50(8) equation:

Simplifying
42 = x + -0.50(8)

Multiply -0.50 * 8
42 = x + -4

Reorder the terms:
42 = -4 + x

Solving
42 = -4 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
42 + -1x = -4 + x + -1x

Combine like terms: x + -1x = 0
42 + -1x = -4 + 0
42 + -1x = -4

Add '-42' to each side of the equation.
42 + -42 + -1x = -4 + -42

Combine like terms: 42 + -42 = 0
0 + -1x = -4 + -42
-1x = -4 + -42

Combine like terms: -4 + -42 = -46
-1x = -46

Divide each side by '-1'.
x = 46

Simplifying
x = 46