21-x+3=8

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Solution for 21-x+3=8 equation: 



21-x+3=8

We move all terms to the left:

21-x+3-(8)=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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