12+7x=42

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Solution for 12+7x=42 equation: 



12+7x=42

We move all terms to the left:

12+7x-(42)=0

We add all the numbers together, and all the variables

7x-30=0

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

7x=30

x=30/7

x=4+2/7

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