17x+9=15x+21

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Solution for 17x+9=15x+21 equation: 



17x+9=15x+21

We move all terms to the left:

17x+9-(15x+21)=0

We get rid of parentheses

17x-15x-21+9=0

We add all the numbers together, and all the variables

2x-12=0

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

2x=12

x=12/2

x=6

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