8a-9=87

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Solution for 8a-9=87 equation: 


Simplifying
8a + -9 = 87

Reorder the terms:
-9 + 8a = 87

Solving
-9 + 8a = 87

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 + 8a = 87 + 9

Combine like terms: -9 + 9 = 0
0 + 8a = 87 + 9
8a = 87 + 9

Combine like terms: 87 + 9 = 96
8a = 96

Divide each side by '8'.
a = 12

Simplifying
a = 12

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