(x+1)=21

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Solution for (x+1)=21 equation: 



(x+1)=21

We move all terms to the left:

(x+1)-(21)=0

We get rid of parentheses

x+1-21=0

We add all the numbers together, and all the variables

x-20=0

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

x=20

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