5x-13=7x+21

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Solution for 5x-13=7x+21 equation: 



5x-13=7x+21

We move all terms to the left:

5x-13-(7x+21)=0

We get rid of parentheses

5x-7x-21-13=0

We add all the numbers together, and all the variables

-2x-34=0

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

-2x=34

x=34/-2

x=-17

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