How do you work out the equation 1-x=9.

x=8

Step-by-step explanation:

x + 1 = 9

Simplifying

x + 1 = 9

Reorder the terms:

1 + x = 9

Solving

1 + x = 9

Solving for variable 'x'.

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

Add '-1' to each side of the equation.

1 + - 1 + x = 9 + - 1

Combine like terms: 1 + - 1 = 0

0 + x = 9 + - 1

x = 9 + - 1

Combine like terms: 9 + - 1 = 8

x = 8

Simplifying

x = 8