21x+7=8x+20

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Solution for 21x+7=8x+20 equation: 



21x+7=8x+20

We move all terms to the left:

21x+7-(8x+20)=0

We get rid of parentheses

21x-8x-20+7=0

We add all the numbers together, and all the variables

13x-13=0

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

13x=13

x=13/13

x=1

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