3x+42=5;x

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Solution for 3x+42=5;x equation: 



3x+42=5x

We move all terms to the left:

3x+42-(5x)=0

We add all the numbers together, and all the variables

-2x+42=0

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

-2x=-42

x=-42/-2

x=+21

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