21x=20+8x

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Solution for 21x=20+8x equation: 



21x=20+8x

We move all terms to the left:

21x-(20+8x)=0

We add all the numbers together, and all the variables

21x-(8x+20)=0

We get rid of parentheses

21x-8x-20=0

We add all the numbers together, and all the variables

13x-20=0

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

13x=20

x=20/13

x=1+7/13

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