(x-3)*7=42

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Solution for (x-3)*7=42 equation: 



(x-3)*7=42

We move all terms to the left:

(x-3)*7-(42)=0

We multiply parentheses

7x-21-42=0

We add all the numbers together, and all the variables

7x-63=0

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

7x=63

x=63/7

x=9

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