A=(x+1)-(x-3)

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

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

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

Remove parenthesis around (1 + x)
A = 1 + x + -1(x + -3)

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

Reorder the terms:
A = 1 + 3 + x + -1x

Combine like terms: 1 + 3 = 4
A = 4 + x + -1x

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

Solving
A = 4

Solving for variable 'A'.

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

Simplifying
A = 4