(a-1)=-3

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Solution for (a-1)=-3 equation:


Simplifying
(a + -1) = -3

Reorder the terms:
(-1 + a) = -3

Remove parenthesis around (-1 + a)
-1 + a = -3

Solving
-1 + a = -3

Solving for variable 'a'.

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

Add '1' to each side of the equation.
-1 + 1 + a = -3 + 1

Combine like terms: -1 + 1 = 0
0 + a = -3 + 1
a = -3 + 1

Combine like terms: -3 + 1 = -2
a = -2

Simplifying
a = -2

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