21-7x=18

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Solution for 21-7x=18 equation: 



21-7x=18

We move all terms to the left:

21-7x-(18)=0

We add all the numbers together, and all the variables

-7x+3=0

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

-7x=-3

x=-3/-7

x=3/7

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