21x-7=30

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Solution for 21x-7=30 equation: 



21x-7=30

We move all terms to the left:

21x-7-(30)=0

We add all the numbers together, and all the variables

21x-37=0

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

21x=37

x=37/21

x=1+16/21

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