3(a-1)=-18

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Solution for 3(a-1)=-18 equation: 


Simplifying
3(a + -1) = -18

Reorder the terms:
3(-1 + a) = -18
(-1 * 3 + a * 3) = -18
(-3 + 3a) = -18

Solving
-3 + 3a = -18

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 3a = -18 + 3

Combine like terms: -3 + 3 = 0
0 + 3a = -18 + 3
3a = -18 + 3

Combine like terms: -18 + 3 = -15
3a = -15

Divide each side by '3'.
a = -5

Simplifying
a = -5

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