3-(-2x+1)=21

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



3-(-2x+1)=21

We move all terms to the left:

3-(-2x+1)-(21)=0

We add all the numbers together, and all the variables

-(-2x+1)-18=0

We get rid of parentheses

2x-1-18=0

We add all the numbers together, and all the variables

2x-19=0

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

2x=19

x=19/2

x=9+1/2

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