(7+2x)3=4x+9x

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Solution for (7+2x)3=4x+9x equation: 



(7+2x)3=4x+9x

We move all terms to the left:

(7+2x)3-(4x+9x)=0

We add all the numbers together, and all the variables

(2x+7)3-(+13x)=0

We multiply parentheses

6x-(+13x)+21=0

We get rid of parentheses

6x-13x+21=0

We add all the numbers together, and all the variables

-7x+21=0

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

-7x=-21

x=-21/-7

x=+3

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