1+(-a)-9-4=0

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Solution for 1+(-a)-9-4=0 equation:


Simplifying
1 + (-1a) + -9 + -4 = 0

Reorder the terms:
1 + -9 + -4 + (-1a) = 0

Combine like terms: 1 + -9 = -8
-8 + -4 + (-1a) = 0

Combine like terms: -8 + -4 = -12
-12 + (-1a) = 0

Solving
-12 + (-1a) = 0

Solving for variable 'a'.

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

Add '12' to each side of the equation.
-12 + 12 + (-1a) = 0 + 12

Combine like terms: -12 + 12 = 0
0 + (-1a) = 0 + 12
(-1a) = 0 + 12

Combine like terms: 0 + 12 = 12
(-1a) = 12

Divide each side by '-1'.
a = -12

Simplifying
a = -12

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