x+ab-1=-1

Solution for x+ab-1=-1 equation:

Simplifying
x + ab + -1 = -1

Reorder the terms:
-1 + ab + x = -1

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

Reorder the terms:
-1 + 1 + ab + x = -1 + 1

Combine like terms: -1 + 1 = 0
0 + ab + x = -1 + 1
ab + x = -1 + 1

Combine like terms: -1 + 1 = 0
ab + x = 0

Solving
ab + x = 0

Solving for variable 'a'.

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

Add '-1x' to each side of the equation.
ab + x + -1x = 0 + -1x

Combine like terms: x + -1x = 0
ab + 0 = 0 + -1x
ab = 0 + -1x
Remove the zero:
ab = -1x

Divide each side by 'b'.
a = -1b-1x

Simplifying
a = -1b-1x