[7-9a]=88

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Solution for [7-9a]=88 equation: 


Simplifying
[7 + -9a] = 88

Remove brackets around [7 + -9a]
7 + -9a = 88

Solving
7 + -9a = 88

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + -9a = 88 + -7

Combine like terms: 7 + -7 = 0
0 + -9a = 88 + -7
-9a = 88 + -7

Combine like terms: 88 + -7 = 81
-9a = 81

Divide each side by '-9'.
a = -9

Simplifying
a = -9

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