9-(2a+6)=9

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Solution for 9-(2a+6)=9 equation:


Simplifying
9 + -1(2a + 6) = 9

Reorder the terms:
9 + -1(6 + 2a) = 9
9 + (6 * -1 + 2a * -1) = 9
9 + (-6 + -2a) = 9

Combine like terms: 9 + -6 = 3
3 + -2a = 9

Solving
3 + -2a = 9

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + -2a = 9 + -3

Combine like terms: 3 + -3 = 0
0 + -2a = 9 + -3
-2a = 9 + -3

Combine like terms: 9 + -3 = 6
-2a = 6

Divide each side by '-2'.
a = -3

Simplifying
a = -3

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