21-2x=28

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Solution for 21-2x=28 equation: 



21-2x=28

We move all terms to the left:

21-2x-(28)=0

We add all the numbers together, and all the variables

-2x-7=0

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

-2x=7

x=7/-2

x=-3+1/2

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