9a-15=66

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Solution for 9a-15=66 equation: 


Simplifying
9a + -15 = 66

Reorder the terms:
-15 + 9a = 66

Solving
-15 + 9a = 66

Solving for variable 'a'.

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

Add '15' to each side of the equation.
-15 + 15 + 9a = 66 + 15

Combine like terms: -15 + 15 = 0
0 + 9a = 66 + 15
9a = 66 + 15

Combine like terms: 66 + 15 = 81
9a = 81

Divide each side by '9'.
a = 9

Simplifying
a = 9

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