3=(2x-1)+2x=21

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Solution for 3=(2x-1)+2x=21 equation: 



3=(2x-1)+2x=21

We move all terms to the left:

3-((2x-1)+2x)=0



We calculate terms in parentheses: -((2x-1)+2x), so:

(2x-1)+2x

We add all the numbers together, and all the variables

2x+(2x-1)

We get rid of parentheses

2x+2x-1

We add all the numbers together, and all the variables

4x-1

Back to the equation:

-(4x-1)



We get rid of parentheses

-4x+1+3=0

We add all the numbers together, and all the variables

-4x+4=0

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

-4x=-4

x=-4/-4

x=1

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