4+x+7+x=30

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Solution for 4+x+7+x=30 equation: 



4+x+7+x=30

We move all terms to the left:

4+x+7+x-(30)=0

We add all the numbers together, and all the variables

2x-19=0

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

2x=19

x=19/2

x=9+1/2

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