3x+42=12

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Solution for 3x+42=12 equation: 



3x+42=12

We move all terms to the left:

3x+42-(12)=0

We add all the numbers together, and all the variables

3x+30=0

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

3x=-30

x=-30/3

x=-10

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