8x+21=x-49

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Solution for 8x+21=x-49 equation: 



8x+21=x-49

We move all terms to the left:

8x+21-(x-49)=0

We get rid of parentheses

8x-x+49+21=0

We add all the numbers together, and all the variables

7x+70=0

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

7x=-70

x=-70/7

x=-10

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