x=(a+1)*(b-1)

Solution for x=(a+1)*(b-1) equation:

Simplifying
x = (a + 1)(b + -1)

Reorder the terms:
x = (1 + a)(b + -1)

Reorder the terms:
x = (1 + a)(-1 + b)

Multiply (1 + a) * (-1 + b)
x = (1(-1 + b) + a(-1 + b))
x = ((-1 * 1 + b * 1) + a(-1 + b))
x = ((-1 + 1b) + a(-1 + b))
x = (-1 + 1b + (-1 * a + b * a))
x = (-1 + 1b + (-1a + ab))

Reorder the terms:
x = (-1 + -1a + ab + 1b)
x = (-1 + -1a + ab + 1b)

Solving
x = -1 + -1a + ab + 1b

Solving for variable 'x'.

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

Simplifying
x = -1 + -1a + ab + 1b