6a-(9-a)=4a-12

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Solution for 6a-(9-a)=4a-12 equation:


Simplifying
6a + -1(9 + -1a) = 4a + -12
6a + (9 * -1 + -1a * -1) = 4a + -12
6a + (-9 + 1a) = 4a + -12

Reorder the terms:
-9 + 6a + 1a = 4a + -12

Combine like terms: 6a + 1a = 7a
-9 + 7a = 4a + -12

Reorder the terms:
-9 + 7a = -12 + 4a

Solving
-9 + 7a = -12 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
-9 + 7a + -4a = -12 + 4a + -4a

Combine like terms: 7a + -4a = 3a
-9 + 3a = -12 + 4a + -4a

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

Add '9' to each side of the equation.
-9 + 9 + 3a = -12 + 9

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

Combine like terms: -12 + 9 = -3
3a = -3

Divide each side by '3'.
a = -1

Simplifying
a = -1

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