(1-2x)-7=21

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Solution for (1-2x)-7=21 equation: 



(1-2x)-7=21

We move all terms to the left:

(1-2x)-7-(21)=0

We add all the numbers together, and all the variables

(-2x+1)-7-21=0

We add all the numbers together, and all the variables

(-2x+1)-28=0

We get rid of parentheses

-2x+1-28=0

We add all the numbers together, and all the variables

-2x-27=0

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

-2x=27

x=27/-2

x=-13+1/2

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