-(a+9)=4(3-a)

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Solution for -(a+9)=4(3-a) equation:


Simplifying
-1(a + 9) = 4(3 + -1a)

Reorder the terms:
-1(9 + a) = 4(3 + -1a)
(9 * -1 + a * -1) = 4(3 + -1a)
(-9 + -1a) = 4(3 + -1a)
-9 + -1a = (3 * 4 + -1a * 4)
-9 + -1a = (12 + -4a)

Solving
-9 + -1a = 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 + -1a + 4a = 12 + -4a + 4a

Combine like terms: -1a + 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 = 21
3a = 21

Divide each side by '3'.
a = 7

Simplifying
a = 7

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