2x-12=5x-21

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Solution for 2x-12=5x-21 equation: 



2x-12=5x-21

We move all terms to the left:

2x-12-(5x-21)=0

We get rid of parentheses

2x-5x+21-12=0

We add all the numbers together, and all the variables

-3x+9=0

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

-3x=-9

x=-9/-3

x=+3

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