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

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Solution for 0-21x=3(-7x)+4 equation: 



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(3(-7x)+4), so:

3(-7x)+4

We multiply parentheses

-21x+4

Back to the equation:

-(-21x+4)



We get rid of parentheses

-21x+21x-4=0

We add all the numbers together, and all the variables

-4!=0

There is no solution for this equation

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