3-3(a+2)=9+a

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Solution for 3-3(a+2)=9+a equation:


Simplifying
3 + -3(a + 2) = 9 + a

Reorder the terms:
3 + -3(2 + a) = 9 + a
3 + (2 * -3 + a * -3) = 9 + a
3 + (-6 + -3a) = 9 + a

Combine like terms: 3 + -6 = -3
-3 + -3a = 9 + a

Solving
-3 + -3a = 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.
-3 + -3a + -1a = 9 + a + -1a

Combine like terms: -3a + -1a = -4a
-3 + -4a = 9 + a + -1a

Combine like terms: a + -1a = 0
-3 + -4a = 9 + 0
-3 + -4a = 9

Add '3' to each side of the equation.
-3 + 3 + -4a = 9 + 3

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

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

Divide each side by '-4'.
a = -3

Simplifying
a = -3

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