x+(-2x-1)=3

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



x+(-2x-1)=3

We move all terms to the left:

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

We get rid of parentheses

x-2x-1-3=0

We add all the numbers together, and all the variables

-1x-4=0

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

-x=4

x=4/-1

x=-4

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