21x-28=56

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Solution for 21x-28=56 equation: 



21x-28=56

We move all terms to the left:

21x-28-(56)=0

We add all the numbers together, and all the variables

21x-84=0

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

21x=84

x=84/21

x=4

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