17x+12-13x=9x-21

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Solution for 17x+12-13x=9x-21 equation: 



17x+12-13x=9x-21

We move all terms to the left:

17x+12-13x-(9x-21)=0

We add all the numbers together, and all the variables

4x-(9x-21)+12=0

We get rid of parentheses

4x-9x+21+12=0

We add all the numbers together, and all the variables

-5x+33=0

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

-5x=-33

x=-33/-5

x=6+3/5

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