7(1-2x)-3=4-21x

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Solution for 7(1-2x)-3=4-21x equation: 



7(1-2x)-3=4-21x

We move all terms to the left:

7(1-2x)-3-(4-21x)=0

We add all the numbers together, and all the variables

7(-2x+1)-(-21x+4)-3=0

We multiply parentheses

-14x-(-21x+4)+7-3=0

We get rid of parentheses

-14x+21x-4+7-3=0

We add all the numbers together, and all the variables

7x=0

x=0/7

x=0

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