(4a-12)+(2a+9)=

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Solution for (4a-12)+(2a+9)= equation:


Simplifying
(4a + -12) + (2a + 9) = 0

Reorder the terms:
(-12 + 4a) + (2a + 9) = 0

Remove parenthesis around (-12 + 4a)
-12 + 4a + (2a + 9) = 0

Reorder the terms:
-12 + 4a + (9 + 2a) = 0

Remove parenthesis around (9 + 2a)
-12 + 4a + 9 + 2a = 0

Reorder the terms:
-12 + 9 + 4a + 2a = 0

Combine like terms: -12 + 9 = -3
-3 + 4a + 2a = 0

Combine like terms: 4a + 2a = 6a
-3 + 6a = 0

Solving
-3 + 6a = 0

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 + 6a = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 6a = 0 + 3
6a = 0 + 3

Combine like terms: 0 + 3 = 3
6a = 3

Divide each side by '6'.
a = 0.5

Simplifying
a = 0.5

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