420=(15+x)15

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Solution for 420=(15+x)15 equation: 



420=(15+x)15

We move all terms to the left:

420-((15+x)15)=0

We add all the numbers together, and all the variables

-((x+15)15)+420=0



We calculate terms in parentheses: -((x+15)15), so:

(x+15)15

We multiply parentheses

15x+225

Back to the equation:

-(15x+225)



We get rid of parentheses

-15x-225+420=0

We add all the numbers together, and all the variables

-15x+195=0

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

-15x=-195

x=-195/-15

x=+13

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