21-2x=5

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Solution for 21-2x=5 equation: 



21-2x=5

We move all terms to the left:

21-2x-(5)=0

We add all the numbers together, and all the variables

-2x+16=0

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

-2x=-16

x=-16/-2

x=+8

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