30=4x+9

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Solution for 30=4x+9 equation: 



30=4x+9

We move all terms to the left:

30-(4x+9)=0

We get rid of parentheses

-4x-9+30=0

We add all the numbers together, and all the variables

-4x+21=0

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

-4x=-21

x=-21/-4

x=5+1/4

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