10-2(a+2)=9+a

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Solution for 10-2(a+2)=9+a equation: 


Simplifying
10 + -2(a + 2) = 9 + a

Reorder the terms:
10 + -2(2 + a) = 9 + a
10 + (2 * -2 + a * -2) = 9 + a
10 + (-4 + -2a) = 9 + a

Combine like terms: 10 + -4 = 6
6 + -2a = 9 + a

Solving
6 + -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.
6 + -2a + -1a = 9 + a + -1a

Combine like terms: -2a + -1a = -3a
6 + -3a = 9 + a + -1a

Combine like terms: a + -1a = 0
6 + -3a = 9 + 0
6 + -3a = 9

Add '-6' to each side of the equation.
6 + -6 + -3a = 9 + -6

Combine like terms: 6 + -6 = 0
0 + -3a = 9 + -6
-3a = 9 + -6

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

Divide each side by '-3'.
a = -1

Simplifying
a = -1

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