42=23+x

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Solution for 42=23+x equation: 



42=23+x

We move all terms to the left:

42-(23+x)=0

We add all the numbers together, and all the variables

-(x+23)+42=0

We get rid of parentheses

-x-23+42=0

We add all the numbers together, and all the variables

-1x+19=0

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

-x=-19

x=-19/-1

x=+19

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