21x-56=8x+9

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Solution for 21x-56=8x+9 equation: 



21x-56=8x+9

We move all terms to the left:

21x-56-(8x+9)=0

We get rid of parentheses

21x-8x-9-56=0

We add all the numbers together, and all the variables

13x-65=0

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

13x=65

x=65/13

x=5

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