(2x+21)=4x

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Solution for (2x+21)=4x equation: 



(2x+21)=4x

We move all terms to the left:

(2x+21)-(4x)=0

We add all the numbers together, and all the variables

-4x+(2x+21)=0

We get rid of parentheses

-4x+2x+21=0

We add all the numbers together, and all the variables

-2x+21=0

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

-2x=-21

x=-21/-2

x=10+1/2

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