-(a-4)=1

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Solution for -(a-4)=1 equation: 


Simplifying
-1(a + -4) = 1

Reorder the terms:
-1(-4 + a) = 1
(-4 * -1 + a * -1) = 1
(4 + -1a) = 1

Solving
4 + -1a = 1

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + -1a = 1 + -4

Combine like terms: 4 + -4 = 0
0 + -1a = 1 + -4
-1a = 1 + -4

Combine like terms: 1 + -4 = -3
-1a = -3

Divide each side by '-1'.
a = 3

Simplifying
a = 3

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