21+9=6x

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Solution for 21+9=6x equation: 



21+9=6x

We move all terms to the left:

21+9-(6x)=0

We add all the numbers together, and all the variables

-6x+30=0

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

-6x=-30

x=-30/-6

x=+5

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