18x=21-12

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Solution for 18x=21-12 equation: 



18x=21-12

We move all terms to the left:

18x-(21-12)=0

We add all the numbers together, and all the variables

18x-9=0

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

18x=9

x=9/18

x=1/2

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