2x-21=5x-18

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Solution for 2x-21=5x-18 equation: 



2x-21=5x-18

We move all terms to the left:

2x-21-(5x-18)=0

We get rid of parentheses

2x-5x+18-21=0

We add all the numbers together, and all the variables

-3x-3=0

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

-3x=3

x=3/-3

x=-1

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