(x+3)*3=42

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Solution for (x+3)*3=42 equation: 



(x+3)*3=42

We move all terms to the left:

(x+3)*3-(42)=0

We multiply parentheses

3x+9-42=0

We add all the numbers together, and all the variables

3x-33=0

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

3x=33

x=33/3

x=11

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