3(a-2)=18

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Solution for 3(a-2)=18 equation: 


Simplifying
3(a + -2) = 18

Reorder the terms:
3(-2 + a) = 18
(-2 * 3 + a * 3) = 18
(-6 + 3a) = 18

Solving
-6 + 3a = 18

Solving for variable 'a'.

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

Add '6' to each side of the equation.
-6 + 6 + 3a = 18 + 6

Combine like terms: -6 + 6 = 0
0 + 3a = 18 + 6
3a = 18 + 6

Combine like terms: 18 + 6 = 24
3a = 24

Divide each side by '3'.
a = 8

Simplifying
a = 8

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