21x+84=210

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Solution for 21x+84=210 equation: 



21x+84=210

We move all terms to the left:

21x+84-(210)=0

We add all the numbers together, and all the variables

21x-126=0

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

21x=126

x=126/21

x=6

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