-9(a-1)=18

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Solution for -9(a-1)=18 equation: 


Simplifying
-9(a + -1) = 18

Reorder the terms:
-9(-1 + a) = 18
(-1 * -9 + a * -9) = 18
(9 + -9a) = 18

Solving
9 + -9a = 18

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 + -9a = 18 + -9

Combine like terms: 9 + -9 = 0
0 + -9a = 18 + -9
-9a = 18 + -9

Combine like terms: 18 + -9 = 9
-9a = 9

Divide each side by '-9'.
a = -1

Simplifying
a = -1

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