-4(a+6)=a-9

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


Simplifying
-4(a + 6) = a + -9

Reorder the terms:
-4(6 + a) = a + -9
(6 * -4 + a * -4) = a + -9
(-24 + -4a) = a + -9

Reorder the terms:
-24 + -4a = -9 + a

Solving
-24 + -4a = -9 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-24 + -4a + -1a = -9 + a + -1a

Combine like terms: -4a + -1a = -5a
-24 + -5a = -9 + a + -1a

Combine like terms: a + -1a = 0
-24 + -5a = -9 + 0
-24 + -5a = -9

Add '24' to each side of the equation.
-24 + 24 + -5a = -9 + 24

Combine like terms: -24 + 24 = 0
0 + -5a = -9 + 24
-5a = -9 + 24

Combine like terms: -9 + 24 = 15
-5a = 15

Divide each side by '-5'.
a = -3

Simplifying
a = -3

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