9x+13=3x+21

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Solution for 9x+13=3x+21 equation: 



9x+13=3x+21

We move all terms to the left:

9x+13-(3x+21)=0

We get rid of parentheses

9x-3x-21+13=0

We add all the numbers together, and all the variables

6x-8=0

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

6x=8

x=8/6

x=1+1/3

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