4-x+1=21

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Solution for 4-x+1=21 equation: 



4-x+1=21

We move all terms to the left:

4-x+1-(21)=0

We add all the numbers together, and all the variables

-1x-16=0

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

-x=16

x=16/-1

x=-16

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