20=10(3+x)

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Solution for 20=10(3+x) equation: 



20=10(3+x)

We move all terms to the left:

20-(10(3+x))=0

We add all the numbers together, and all the variables

-(10(x+3))+20=0



We calculate terms in parentheses: -(10(x+3)), so:

10(x+3)

We multiply parentheses

10x+30

Back to the equation:

-(10x+30)



We get rid of parentheses

-10x-30+20=0

We add all the numbers together, and all the variables

-10x-10=0

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

-10x=10

x=10/-10

x=-1

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