[a+9]=8

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Solution for [a+9]=8 equation: 


Simplifying
[a + 9] = 8

Reorder the terms:
[9 + a] = 8

Remove brackets around [9 + a]
9 + a = 8

Solving
9 + a = 8

Solving for variable 'a'.

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

Add '-9' to each side of the equation.
9 + -9 + a = 8 + -9

Combine like terms: 9 + -9 = 0
0 + a = 8 + -9
a = 8 + -9

Combine like terms: 8 + -9 = -1
a = -1

Simplifying
a = -1

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