-(a-3)=4

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Solution for -(a-3)=4 equation: 


Simplifying
-1(a + -3) = 4

Reorder the terms:
-1(-3 + a) = 4
(-3 * -1 + a * -1) = 4
(3 + -1a) = 4

Solving
3 + -1a = 4

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + -1a = 4 + -3

Combine like terms: 3 + -3 = 0
0 + -1a = 4 + -3
-1a = 4 + -3

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

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

Simplifying
a = -1

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