3(a+3)=18

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Solution for 3(a+3)=18 equation: 



3(a+3)=18

We move all terms to the left:

3(a+3)-(18)=0

We multiply parentheses

3a+9-18=0

We add all the numbers together, and all the variables

3a-9=0

We move all terms containing a to the left, all other terms to the right

3a=9

a=9/3

a=3

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