18-x/3=21

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Solution for 18-x/3=21 equation: 



18-x/3=21

We move all terms to the left:

18-x/3-(21)=0

We add all the numbers together, and all the variables

-x/3-3=0

We multiply all the terms by the denominator


-x-3*3=0

We add all the numbers together, and all the variables

-1x-9=0

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

-x=9

x=9/-1

x=-9

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