18+4+9=x

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Solution for 18+4+9=x equation: 



18+4+9=x

We move all terms to the left:

18+4+9-(x)=0

We add all the numbers together, and all the variables

-1x+31=0

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

-x=-31

x=-31/-1

x=+31

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