28x-7=21

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Solution for 28x-7=21 equation: 



28x-7=21

We move all terms to the left:

28x-7-(21)=0

We add all the numbers together, and all the variables

28x-28=0

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

28x=28

x=28/28

x=1

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