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

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Solution for 1-2(a+2)=9+a equation:


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

Reorder the terms:
1 + -2(2 + a) = 9 + a
1 + (2 * -2 + a * -2) = 9 + a
1 + (-4 + -2a) = 9 + a

Combine like terms: 1 + -4 = -3
-3 + -2a = 9 + a

Solving
-3 + -2a = 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 + -2a + -1a = 9 + a + -1a

Combine like terms: -2a + -1a = -3a
-3 + -3a = 9 + a + -1a

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

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

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

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

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

Simplifying
a = -4

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