420=30(x+9)

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Solution for 420=30(x+9) equation: 



420=30(x+9)

We move all terms to the left:

420-(30(x+9))=0



We calculate terms in parentheses: -(30(x+9)), so:

30(x+9)

We multiply parentheses

30x+270

Back to the equation:

-(30x+270)



We get rid of parentheses

-30x-270+420=0

We add all the numbers together, and all the variables

-30x+150=0

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

-30x=-150

x=-150/-30

x=+5

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