23=30+x

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Solution for 23=30+x equation: 



23=30+x

We move all terms to the left:

23-(30+x)=0

We add all the numbers together, and all the variables

-(x+30)+23=0

We get rid of parentheses

-x-30+23=0

We add all the numbers together, and all the variables

-1x-7=0

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

-x=7

x=7/-1

x=-7

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