(8)x+21=x-3(7)

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Solution for (8)x+21=x-3(7) equation: 



(8)x+21=x-3(7)

We move all terms to the left:

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

We get rid of parentheses

8x-x+37+21=0

We add all the numbers together, and all the variables

7x+58=0

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

7x=-58

x=-58/7

x=-8+2/7

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