7x+18+21x-7x=18

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Solution for 7x+18+21x-7x=18 equation: 



7x+18+21x-7x=18

We move all terms to the left:

7x+18+21x-7x-(18)=0

We add all the numbers together, and all the variables

21x=0

x=0/21

x=0

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