8X-9=3x-21

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Solution for 8X-9=3x-21 equation: 



8X-9=3X-21

We move all terms to the left:

8X-9-(3X-21)=0

We get rid of parentheses

8X-3X+21-9=0

We add all the numbers together, and all the variables

5X+12=0

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

5X=-12

X=-12/5

X=-2+2/5

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