(10x+21)=13x

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Solution for (10x+21)=13x equation: 



(10x+21)=13x

We move all terms to the left:

(10x+21)-(13x)=0

We add all the numbers together, and all the variables

-13x+(10x+21)=0

We get rid of parentheses

-13x+10x+21=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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