2x-3=4x-21

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Solution for 2x-3=4x-21 equation: 



2x-3=4x-21

We move all terms to the left:

2x-3-(4x-21)=0

We get rid of parentheses

2x-4x+21-3=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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