6x-21=4x-3

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Solution for 6x-21=4x-3 equation: 



6x-21=4x-3

We move all terms to the left:

6x-21-(4x-3)=0

We get rid of parentheses

6x-4x+3-21=0

We add all the numbers together, and all the variables

2x-18=0

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

2x=18

x=18/2

x=9

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