12-(x+1)=3+x

Solution for 12-(x+1)=3+x equation:

Simplifying
12 + -1(x + 1) = 3 + x

Reorder the terms:
12 + -1(1 + x) = 3 + x
12 + (1 * -1 + x * -1) = 3 + x
12 + (-1 + -1x) = 3 + x

Combine like terms: 12 + -1 = 11
11 + -1x = 3 + x

Solving
11 + -1x = 3 + 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.
11 + -1x + -1x = 3 + x + -1x

Combine like terms: -1x + -1x = -2x
11 + -2x = 3 + x + -1x

Combine like terms: x + -1x = 0
11 + -2x = 3 + 0
11 + -2x = 3

Add '-11' to each side of the equation.
11 + -11 + -2x = 3 + -11

Combine like terms: 11 + -11 = 0
0 + -2x = 3 + -11
-2x = 3 + -11

Combine like terms: 3 + -11 = -8
-2x = -8

Divide each side by '-2'.
x = 4

Simplifying
x = 4