-(a+4a)=-12

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Solution for -(a+4a)=-12 equation: 


Simplifying
-1(a + 4a) = -12

Combine like terms: a + 4a = 5a
-1(5a) = -12

Remove parenthesis around (5a)
-1 * 5a = -12

Multiply -1 * 5
-5a = -12

Solving
-5a = -12

Solving for variable 'a'.

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

Divide each side by '-5'.
a = 2.4

Simplifying
a = 2.4

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