3a-9(11a+3)=9a+12(a+6)

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Solution for 3a-9(11a+3)=9a+12(a+6) equation:


Simplifying
3a + -9(11a + 3) = 9a + 12(a + 6)

Reorder the terms:
3a + -9(3 + 11a) = 9a + 12(a + 6)
3a + (3 * -9 + 11a * -9) = 9a + 12(a + 6)
3a + (-27 + -99a) = 9a + 12(a + 6)

Reorder the terms:
-27 + 3a + -99a = 9a + 12(a + 6)

Combine like terms: 3a + -99a = -96a
-27 + -96a = 9a + 12(a + 6)

Reorder the terms:
-27 + -96a = 9a + 12(6 + a)
-27 + -96a = 9a + (6 * 12 + a * 12)
-27 + -96a = 9a + (72 + 12a)

Reorder the terms:
-27 + -96a = 72 + 9a + 12a

Combine like terms: 9a + 12a = 21a
-27 + -96a = 72 + 21a

Solving
-27 + -96a = 72 + 21a

Solving for variable 'a'.

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

Add '-21a' to each side of the equation.
-27 + -96a + -21a = 72 + 21a + -21a

Combine like terms: -96a + -21a = -117a
-27 + -117a = 72 + 21a + -21a

Combine like terms: 21a + -21a = 0
-27 + -117a = 72 + 0
-27 + -117a = 72

Add '27' to each side of the equation.
-27 + 27 + -117a = 72 + 27

Combine like terms: -27 + 27 = 0
0 + -117a = 72 + 27
-117a = 72 + 27

Combine like terms: 72 + 27 = 99
-117a = 99

Divide each side by '-117'.
a = -0.8461538462

Simplifying
a = -0.8461538462

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