6x-21=10x-9

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Solution for 6x-21=10x-9 equation: 



6x-21=10x-9

We move all terms to the left:

6x-21-(10x-9)=0

We get rid of parentheses

6x-10x+9-21=0

We add all the numbers together, and all the variables

-4x-12=0

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

-4x=12

x=12/-4

x=-3

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