30x-18=21x

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Solution for 30x-18=21x equation: 



30x-18=21x

We move all terms to the left:

30x-18-(21x)=0

We add all the numbers together, and all the variables

9x-18=0

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

9x=18

x=18/9

x=2

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