2(a+7)-9=9

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Solution for 2(a+7)-9=9 equation:


Simplifying
2(a + 7) + -9 = 9

Reorder the terms:
2(7 + a) + -9 = 9
(7 * 2 + a * 2) + -9 = 9
(14 + 2a) + -9 = 9

Reorder the terms:
14 + -9 + 2a = 9

Combine like terms: 14 + -9 = 5
5 + 2a = 9

Solving
5 + 2a = 9

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + 2a = 9 + -5

Combine like terms: 5 + -5 = 0
0 + 2a = 9 + -5
2a = 9 + -5

Combine like terms: 9 + -5 = 4
2a = 4

Divide each side by '2'.
a = 2

Simplifying
a = 2

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