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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3x-(-419x)+7=0

We get rid of parentheses

-3x+419x+7=0

We add all the numbers together, and all the variables

416x+7=0

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

416x=-7

x=-7/416

x=-7/416

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